Habrocerus capillaricornis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 130
Habrophlebia fusca
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 284
Haddock
- Group
- Fish
- Peak month
- August
- Records since 2000
- 617,374
Hadroplontus litura
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 238
Haematobosca stimulans
- Group
- True flies
- Peak month
- June
- Records since 2000
- 131
Haematopota bigoti
- Group
- True flies
- Peak month
- July
- Records since 2000
- 85
Haematopota grandis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 86
Hageniella micans
- Group
- Mosses
- Peak month
- October
- Records since 2000
- 62
Hagfish
- Group
- Fish
- Peak month
- August
- Records since 2000
- 1,489
Hagiosynodos latus
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 767
Hahnia nava
- Group
- Spiders
- Peak month
- May
- Records since 2000
- 118
Hair Sedge
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 141
Hair-pointed Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 5,694
Hairlike Pondweed
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 64
Hairy Beech Gall
- Group
- True flies
- Peak month
- September
- Records since 2000
- 886
Hairy Bindweed
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 125
Hairy Bird's-foot-trefoil
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 120
Hairy Bitter-cress
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 5,395
Hairy Buttercup
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 161
Hairy Cellar Beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 135
Hairy click beetle
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 554
Hairy Curtain Crust
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 6,976
Hairy Dragonfly
- Group
- Dragonflies and damselflies
- Peak month
- May
- Records since 2000
- 20,883
Hairy Earthtongue
- Group
- Fungi
- Peak month
- November
- Records since 2000
- 638
Hairy Footed Flower Bee
- Group
- Bees, wasps and ants
- Peak month
- April
- Records since 2000
- 15,558
Hairy groundbug
- Group
- True bugs
- Peak month
- August
- Records since 2000
- 614
Hairy Lady's-mantle
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 717
Hairy Legged Mining Bee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 824
Hairy Michaelmas daisy
- Group
- Flowering plants
- Peak month
- October
- Records since 2000
- 284
Hairy poplar sawfly
- Group
- Bees, wasps and ants
- Peak month
- September
- Records since 2000
- 66
Hairy reed beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 64
Hairy Rock-cress
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 316
Hairy rockrose
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 240
Hairy rove beetle
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 130
Hairy Sand Wasp
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 353
Hairy Sand Weed
- Group
- Seaweeds and algae
- Peak month
- July
- Records since 2000
- 1,583
Hairy Sea-mat
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 11,414
Hairy sea-squirt
- Group
- Sea squirts
- Peak month
- September
- Records since 2000
- 1,872
Hairy Sedge
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 3,686
Hairy Shieldbug
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 21,763
Hairy Snail
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 4,146
Hairy Spider Weevil
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 1,395
Hairy Spiny Doris
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 1,006
Hairy St John's-wort
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,369
Hairy Stonecrop
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 379
Hairy tare
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 3,912
Hairy Threadwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 784
Hairy Violet
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 1,506
Hairy Whirligig
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 2,611
Hairy Whitlowgrass
- Group
- Flowering plants
- Peak month
- March
- Records since 2000
- 3,432
Hairy Wood Ant
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 1,492
Hairy Wood-rush
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 1,787
Hairy-brome
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 1,695
Hairy-eyed Flower Fly
- Group
- True flies
- Peak month
- April
- Records since 2000
- 2,543
Hairy-eyed Halfband
- Group
- True flies
- Peak month
- April
- Records since 2000
- 657
Hairy-horned Springtail-hunter
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 3,185
Hairy-legged Horsefly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 550
Hairy-stemmed Hawkweed
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 51
Halalaimus gracilis
- Group
- Roundworms
- Peak month
- May
- Records since 2000
- 103
Halalaimus longicaudatus
- Group
- Roundworms
- Peak month
- April
- Records since 2000
- 57
Halarachnion ligulatum
- Group
- Seaweeds and algae
- Peak month
- August
- Records since 2000
- 326
Halargyreus johnsonii
- Group
- Fish
- Peak month
- September
- Records since 2000
- 135
Halcampa chrysanthellum
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 179
Halecania ralfsii
- Group
- Lichens
- Peak month
- July
- Records since 2000
- 76
Halecania viridescens
- Group
- Lichens
- Peak month
- February
- Records since 2000
- 142
Halecium beanii
- Group
- Jellyfish, corals and anemones
- Peak month
- September
- Records since 2000
- 366
Halecium muricatum
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 127
Halecium plumosum
- Group
- Jellyfish, corals and anemones
- Peak month
- June
- Records since 2000
- 85
Halesus digitatus
- Group
- Caddisflies
- Peak month
- April
- Records since 2000
- 2,398
Halesus radiatus
- Group
- Caddisflies
- Peak month
- April
- Records since 2000
- 7,901
Half-naked Hatchetfish, Axefish, Common Hatchetfish, Hatchet Fish, Heath's Hatchet Fish, Silver Hatchetfish, Spurred Hatchetfish
- Group
- Fish
- Peak month
- April
- Records since 2000
- 90
Haliclona cinerea
- Group
- Sponges
- Peak month
- September
- Records since 2000
- 317
Haliclona fistulosa
- Group
- Sponges
- Peak month
- May
- Records since 2000
- 148
Haliclona gustavopulitzeri
- Group
- Sponges
- Peak month
- June
- Records since 2000
- 124
Haliclona simulans
- Group
- Sponges
- Peak month
- September
- Records since 2000
- 396
Haliclystus octoradiatus
- Group
- Jellyfish, corals and anemones
- Peak month
- March
- Records since 2000
- 179
Halicnemia patera
- Group
- Sponges
- Peak month
- September
- Records since 2000
- 53
Halidamia affinis
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 136
Haliplus confinis
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 324
Haliplus flavicollis
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 447
Haliplus fluviatilis
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 662
Haliplus fulvus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 226
Haliplus heydeni
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 404
Haliplus immaculatus
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 918
Haliplus laminatus
- Group
- Beetles
- Peak month
- October
- Records since 2000
- 133
Haliplus lineatocollis
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 2,077
Haliplus lineolatus
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 276
Haliplus obliquus
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 253
Haliplus ruficollis
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 2,303
Haliplus sibiricus
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 1,021
Haller's bartramia moss
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 189
Hallomenus binotatus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 149
Halochlorococcum moorei
- Group
- Seaweeds and algae
- Peak month
- May
- Records since 2000
- 71
Halocladius variabilis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 79
Halopithys incurvus
- Group
- Seaweeds and algae
- Peak month
- May
- Records since 2000
- 118
Haloplaca sorediella
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 52
Halopteris catharina
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 659
Halopteris filicina
- Group
- Seaweeds and algae
- Peak month
- August
- Records since 2000
- 508
Halopteris scoparia
- Group
- Seaweeds and algae
- Peak month
- May
- Records since 2000
- 115
Halticus luteicollis
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 212
Halurus flosculosus
- Group
- Seaweeds and algae
- Peak month
- August
- Records since 2000
- 737
Halyphysema tumanowiczii
- Group
- Microorganisms and protists
- Peak month
- September
- Records since 2000
- 228
Hammered Shield Lichen
- Group
- Lichens
- Peak month
- April
- Records since 2000
- 10,481
Hampe's Threadwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 766
Hampshire-purslane
- Group
- Flowering plants
- Peak month
- September
- Records since 2000
- 53
Handsome Club
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 674
Handsome plant bug
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 2,323
Handsome Woollywort
- Group
- Liverworts
- Peak month
- April
- Records since 2000
- 959
Hanleya hanleyi
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 165
Hannaea arcus
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 830
Hantzschia amphioxyss
- Group
- Seaweeds and algae
- Peak month
- October
- Records since 2000
- 67
Hapalopilus rutilans
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 241
Haplodrassus signifer
- Group
- Spiders
- Peak month
- July
- Records since 2000
- 176
Haplomitrium hookeri
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 109
Haploops tubicola
- Group
- Crustaceans
- Peak month
- April
- Records since 2000
- 256
Haplophthalmus danicus
- Group
- Crustaceans
- Peak month
- April
- Records since 2000
- 89
Haplophthalmus mengii
- Group
- Crustaceans
- Peak month
- October
- Records since 2000
- 83
Haplopoma impressum
- Group
- Bryozoans
- Peak month
- September
- Records since 2000
- 60
Haplostylus lobatus
- Group
- Crustaceans
- Peak month
- January
- Records since 2000
- 51
Haplostylus normani
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 411
Haplosyllis spongicola
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 256
Haraldiophyllum bonnemaisonii
- Group
- Seaweeds and algae
- Peak month
- August
- Records since 2000
- 79
Harbor porpoise
- Group
- Mammals
- Peak month
- July
- Records since 2000
- 6,518
Harbor seal
- Group
- Mammals
- Peak month
- July
- Records since 2000
- 12,641
Harbour Crab
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 7,062
Hard Rush
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 6,248
Hard Shield-fern
- Group
- Ferns and horsetails
- Peak month
- April
- Records since 2000
- 1,400
Hard-fern
- Group
- Ferns and horsetails
- Peak month
- June
- Records since 2000
- 7,697
Hard-grass
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 127
Hare's-foot Clover
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 1,778
Hare's-tail Cottongrass
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 7,439
Hare'sfoot Inkcap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 1,068
Harebell
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 8,639
Harebell Carpenter Bee
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 575
Harestail grass
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 369
Harlequin Duck
- Group
- Birds
- Peak month
- February
- Records since 2000
- 97
Harlequin ladybird, Asian ladybird, Asian ladybeetle
- Group
- Beetles
- Peak month
- October
- Records since 2000
- 108,560
Harmandiola tremulae
- Group
- True flies
- Peak month
- September
- Records since 2000
- 58
Harmothoe antilopes
- Group
- Worms (annelids)
- Peak month
- February
- Records since 2000
- 310
Harmothoe clavigera
- Group
- Worms (annelids)
- Peak month
- May
- Records since 2000
- 188
Harmothoe extenuata
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 1,568
Harmothoe fragilis
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 445
Harmothoe glabra
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 1,390
Harmothoe imbricata
- Group
- Worms (annelids)
- Peak month
- May
- Records since 2000
- 414
Harmothoe impar
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 4,409
Harmothoe lunulata
- Group
- Worms (annelids)
- Peak month
- September
- Records since 2000
- 95
Harmothoe pagenstecheri
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 137
Harmothoe spinifera
- Group
- Worms (annelids)
- Peak month
- April
- Records since 2000
- 101
Harpactea hombergi
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 279
Harpalus anxius
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 399
Harpalus attenuatus
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 195
Harpalus latus
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 494
Harpalus neglectus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 76
Harpalus pumilus
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 63
Harpalus rufipalpis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 199
Harpalus smaragdinus
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 64
Harpalus tardus
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 792
Harpanthus flotovianus
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 66
Harpanthus scutatus
- Group
- Liverworts
- Peak month
- September
- Records since 2000
- 166
Harpinia antennaria
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 4,695
Harpinia crenulata
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 1,926
Harpinia laevis
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 252
Harpinia mucronata
- Group
- Crustaceans
- Peak month
- April
- Records since 2000
- 60
Harpinia pectinata
- Group
- Crustaceans
- Peak month
- June
- Records since 2000
- 1,577
Harpoon Weed
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 1,543
Harris's Hawk
- Group
- Birds
- Peak month
- March
- Records since 2000
- 158
Harsh Downy-rose
- Group
- Flowering plants
- Peak month
- September
- Records since 2000
- 56
Hart's Tongue Fern Rust
- Group
- Fungi
- Peak month
- April
- Records since 2000
- 557
Hart's-tongue
- Group
- Ferns and horsetails
- Peak month
- May
- Records since 2000
- 15,670
Hart's-Tongue Thyme-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 20,735
Hartman's Grimmia
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 616
Harvest Mouse
- Group
- Mammals
- Peak month
- November
- Records since 2000
- 1,917
Harvestman
- Group
- Mites, harvestmen and other arachnids
- Peak month
- August
- Records since 2000
- 1,316
Hassallia byssoidea
- Group
- Microorganisms and protists
- Peak month
- January
- Records since 2000
- 147
Hasselquist's Hyssop
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 300
Hastings riverbank ground beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 996
Hat-thrower fungus
- Group
- Fungi
- Peak month
- May
- Records since 2000
- 105
Hauptidia maroccana
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 54
Haustorius arenarius
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 567
Hawaiian Goose
- Group
- Birds
- Peak month
- December
- Records since 2000
- 50
Hawfinch
- Group
- Birds
- Peak month
- January
- Records since 2000
- 9,785
Hawk's-Beard Mining-Bee
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 75
Hawkweed
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 170
Hawkweed Oxtongue
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 977
Haworth's Minor
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 506
Haworths pug
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 254
Hawthorn
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 44,514
Hawthorn Cosmet
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 510
Hawthorn lacebug
- Group
- True bugs
- Peak month
- April
- Records since 2000
- 582
Hawthorn Leaf Beetle
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 1,135
Hawthorn Midget
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 546
Hawthorn Mining Bee
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 1,339
Hawthorn Moth
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 547
Hawthorn Shieldbug
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 14,450
Hawthorn Slender
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 1,166
Hay-scented Buckler-fern
- Group
- Ferns and horsetails
- Peak month
- April
- Records since 2000
- 223
Hayhurstia atriplicis
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 316
Hazel
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 33,120
Hazel Bolete
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 96
Hazel Bracket
- Group
- Fungi
- Peak month
- September
- Records since 2000
- 694
Hazel bug
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 1,260
Hazel dormouse
- Group
- Mammals
- Peak month
- October
- Records since 2000
- 1,733
Hazel Gloves
- Group
- Fungi
- Peak month
- November
- Records since 2000
- 387
Hazel Leaf Roller
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 961
Hazel Leaf-roller Weevil
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 1,263
Hazel Pot Beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 130
Hazel Slender
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 771
Hazel Woodwart
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,206
Headfish
- Group
- Fish
- Peak month
- October
- Records since 2000
- 231
Headfly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 2,291
Heart and Club
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 4,700
Heart and Dart
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 17,584
Heart urchin
- Group
- Starfish and sea urchins
- Peak month
- August
- Records since 2000
- 754
Heart-leaved Spear-moss
- Group
- Mosses
- Peak month
- June
- Records since 2000
- 1,548
Heartleaf oxeye
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 145
Heath Bedstraw
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 11,207
Heath bee-fly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 144
Heath Bumble Bee
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 3,910
Heath cudweed
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 58
Heath Dog-violet
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 513
Heath Dumble Dor
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 64
Heath Earwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 1,975
Heath False-brome
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 840
Heath Fingerwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 618
Heath Fragrant-orchid
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 250
Heath fritillary
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 4,096
Heath Fritillary
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 129
Heath Grasshopper
- Group
- Grasshoppers and crickets
- Peak month
- August
- Records since 2000
- 79
Heath Groundsel
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 893
Heath Milkwort
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 3,336
Heath Navel
- Group
- Fungi
- Peak month
- May
- Records since 2000
- 664
Heath Plait-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 21,593
Heath Potter Wasp
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 106
Heath Rush
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 5,286
Heath Rustic
- Group
- Butterflies and moths
- Peak month
- September
- Records since 2000
- 495
Heath Shieldbug
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 51
Heath Snail
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 1,269
Heath Speedwell
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,824
Heath Spotted-orchid
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 15,205
Heath Star Moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 17,406
Heath Threadwort
- Group
- Liverworts
- Peak month
- October
- Records since 2000
- 932
Heath Tiger Beetle
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 275
Heath Waxcap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,062
Heath Wood-rush
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 3,996
Heath-grass
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 2,571
Heather
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 23,828
Heather Beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 1,585
Heather Fly
- Group
- True flies
- Peak month
- August
- Records since 2000
- 1,325
Heather Groundling
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 538
Heather Ladybird
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 883
Heather leafhopper
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 515
Heather Shieldbug
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 417
Hebata decipiens
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 773
Hebecnema fumosa
- Group
- True flies
- Peak month
- May
- Records since 2000
- 60
Hebecnema nigra
- Group
- True flies
- Peak month
- July
- Records since 2000
- 297
Hebecnema nigricolor
- Group
- True flies
- Peak month
- July
- Records since 2000
- 188
Hebecnema umbratica
- Group
- True flies
- Peak month
- July
- Records since 2000
- 578
Hebecnema vespertina
- Group
- True flies
- Peak month
- May
- Records since 2000
- 419
Hebeloma aestivale
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 70
Hebeloma birrus
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 71
Hebeloma leucosarx
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 293
Hebeloma mesophaeum
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 342
Hebeloma pusillum
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 89
Hebeloma radicosum
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 72
Hebeloma sacchariolens
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 349
Hebeloma sinapizans
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 233
Hebrew Character
- Group
- Butterflies and moths
- Peak month
- April
- Records since 2000
- 11,347
Hebrus pusillus
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 105
Hebrus ruficeps
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 288
Hecamede albicans
- Group
- True flies
- Peak month
- July
- Records since 2000
- 77
Hedge Bedstraw
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 885
Hedge Mustard
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 8,158
Hedge rustic
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 412
Hedge Woundwort
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 17,492
Hedgehog
- Group
- Mammals
- Peak month
- August
- Records since 2000
- 23,362
Hedgehog Slug
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 1,879
Hedgerow Crane's-bill
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 3,690
Hedlundia anglica
- Group
- Flowering plants
- Peak month
- September
- Records since 2000
- 74
Hedwigidium imberbe
- Group
- Mosses
- Peak month
- February
- Records since 2000
- 341
Hedya ochroleucana
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 158
Hedya salicella
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 339
Hedychridium roseum
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 109
Hedychrum niemelai
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 92
Hedychrum nobile
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 55
Heim's Pottia
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 500
Helcomyza ustulata
- Group
- True flies
- Peak month
- August
- Records since 2000
- 137
Heleobia charruana
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 60
Heleomyza serrata
- Group
- True flies
- Peak month
- March
- Records since 2000
- 99
Helicobasidium purpureum
- Group
- Fungi
- Peak month
- June
- Records since 2000
- 81
Helicotheca tamesis
- Group
- Seaweeds and algae
- Peak month
- May
- Records since 2000
- 171
Helina abdominalis
- Group
- True flies
- Peak month
- June
- Records since 2000
- 89
Helina confinis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 176
Helina depuncta
- Group
- True flies
- Peak month
- June
- Records since 2000
- 771
Helina impuncta
- Group
- True flies
- Peak month
- June
- Records since 2000
- 1,643
Helina lasiophthalma
- Group
- True flies
- Peak month
- May
- Records since 2000
- 360
Helina latitarsis
- Group
- True flies
- Peak month
- June
- Records since 2000
- 65
Helina maculipennis
- Group
- True flies
- Peak month
- May
- Records since 2000
- 74
Helina obscurata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 187
Helina pertusa
- Group
- True flies
- Peak month
- May
- Records since 2000
- 79
Helina protuberans
- Group
- True flies
- Peak month
- May
- Records since 2000
- 122
Helina pubiseta
- Group
- True flies
- Peak month
- June
- Records since 2000
- 89
Helina quadrum
- Group
- True flies
- Peak month
- August
- Records since 2000
- 192
Helina reversio
- Group
- True flies
- Peak month
- July
- Records since 2000
- 1,124
Helina setiventris
- Group
- True flies
- Peak month
- June
- Records since 2000
- 244
Helina trivittata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 63
Heliophanus cupreus
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 216
Heliophanus flavipes
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 357
Heliozela hammoniella
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 64
Heliozela resplendella
- Group
- Butterflies and moths
- Peak month
- September
- Records since 2000
- 113
Heliozela sericiella
- Group
- Butterflies and moths
- Peak month
- April
- Records since 2000
- 115
Helius flavus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 722
Helius longirostris
- Group
- True flies
- Peak month
- June
- Records since 2000
- 635
Helius pallirostris
- Group
- True flies
- Peak month
- June
- Records since 2000
- 247
Helleborus hybridus
- Group
- Flowering plants
- Peak month
- February
- Records since 2000
- 88
Helmeted Guineafowl
- Group
- Birds
- Peak month
- April
- Records since 2000
- 350
Helminthosphaeria clavariarum
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 84
Helminthosporium velutinum
- Group
- Fungi
- Peak month
- March
- Records since 2000
- 52
Helmutiopsis atrocinerea
- Group
- Lichens
- Peak month
- July
- Records since 2000
- 131
Helochares lividus
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 1,157
Helochares obscurus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 50
Helochares punctatus
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 511
Helophilus hybridus
- Group
- True flies
- Peak month
- August
- Records since 2000
- 1,985
Helophora insignis
- Group
- Spiders
- Peak month
- September
- Records since 2000
- 127
Helophorus aequalis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 2,039
Helophorus brevipalpis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 3,891
Helophorus flavipes
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 1,428
Helophorus grandis
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 1,777
Helophorus minutus
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 1,958
Helophorus nanus
- Group
- Beetles
- Peak month
- March
- Records since 2000
- 102
Helophorus obscurus
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 1,165
Helophorus strigifrons
- Group
- Beetles
- Peak month
- March
- Records since 2000
- 102
Helops caeruleus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 77
Helorus anomalipes
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 60
Helvella acetabulum
- Group
- Fungi
- Peak month
- April
- Records since 2000
- 126
Helvella elastica
- Group
- Fungi
- Peak month
- September
- Records since 2000
- 178
Helvella macropus
- Group
- Fungi
- Peak month
- September
- Records since 2000
- 181
Hemerobius humulinus
- Group
- Lacewings
- Peak month
- July
- Records since 2000
- 122
Hemerobius lutescens
- Group
- Lacewings
- Peak month
- June
- Records since 2000
- 83
Hemerobius micans
- Group
- Lacewings
- Peak month
- April
- Records since 2000
- 136
Hemerobius stigma
- Group
- Lacewings
- Peak month
- March
- Records since 2000
- 99
Hemerodromia raptoria
- Group
- True flies
- Peak month
- June
- Records since 2000
- 120
Hemichroa australis
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 350
Hemicoelus fulvicornis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 506
Hemigrapsus sanguineus
- Group
- Crustaceans
- Peak month
- June
- Records since 2000
- 339
Hemigrapsus takanoi
- Group
- Crustaceans
- Peak month
- June
- Records since 2000
- 322
Hemilamprops roseus
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 242
Hemilepton nitidum
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 825
Hemimycena cucullata
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 133
Hemimycena lactea
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 229
Hemimysis anomala
- Group
- Crustaceans
- Peak month
- October
- Records since 2000
- 169
Hemiptarsenus fulvicollis
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 69
Hemiptarsenus unguicellus
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 176
Hemisphaeric Liverwort
- Group
- Liverworts
- Peak month
- March
- Records since 2000
- 766
Hemitrichapion waltoni
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 86
Hemitrichia calyculata
- Group
- Microorganisms and protists
- Peak month
- October
- Records since 2000
- 60
Hemitrichia decipiens
- Group
- Microorganisms and protists
- Peak month
- October
- Records since 2000
- 216
Hemlock
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,351
Hemlock Water-dropwort
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 9,856
Hemp-agrimony
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 10,961
Hemyda vittata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 51
Hen Harrier
- Group
- Birds
- Peak month
- January
- Records since 2000
- 14,659
Hen of The Woods
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 477
Henbane
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 239
Henbit Dead-nettle
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 1,207
Henestaris laticeps
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 117
Henia vesuviana
- Group
- Centipedes
- Peak month
- April
- Records since 2000
- 74
Hennediella macrophylla
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 323
Henningsomyces candidus
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 155
Henrica melaspora
- Group
- Fungi
- Peak month
- June
- Records since 2000
- 70
Henslow's Pea Mussel
- Group
- Molluscs
- Peak month
- December
- Records since 2000
- 177
Herald
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 1,444
Herald Petrel
- Group
- Birds
- Peak month
- October
- Records since 2000
- 74
Herb-Paris
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 829
Herb-Robert
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 31,116
Herbertus norenus
- Group
- Liverworts
- Peak month
- October
- Records since 2000
- 52
Herbertus stramineus
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 339
Hercostomus aerosus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 720
Hercostomus assimilis
- Group
- True flies
- Peak month
- June
- Records since 2000
- 81
Hercostomus celer
- Group
- True flies
- Peak month
- June
- Records since 2000
- 75
Hercostomus chalybeus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 108
Hercostomus cupreus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 438
Hercostomus germanus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 59
Hercostomus gracilis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 79
Hercostomus metallicus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 81
Hercostomus nanus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 94
Hercostomus nigrilamellatus
- Group
- True flies
- Peak month
- June
- Records since 2000
- 130
Hercostomus nigripennis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 382
Hercostomus nigriplantis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 112
Hercostomus plagiatus
- Group
- True flies
- Peak month
- July
- Records since 2000
- 94
Hercynian Haircap
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,919
Herentia hyndmanni
- Group
- Bryozoans
- Peak month
- February
- Records since 2000
- 187
Herina frondescentiae
- Group
- True flies
- Peak month
- June
- Records since 2000
- 976
Herina germinationis
- Group
- True flies
- Peak month
- July
- Records since 2000
- 53
Herina lugubris
- Group
- True flies
- Peak month
- July
- Records since 2000
- 665
Herina nigrina
- Group
- True flies
- Peak month
- July
- Records since 2000
- 257
Herina palustris
- Group
- True flies
- Peak month
- July
- Records since 2000
- 171
Heringia heringi
- Group
- True flies
- Peak month
- May
- Records since 2000
- 160
Hermaea bifida
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 72
Hermaeophaga mercurialis
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 136
Hermania scabra
- Group
- Molluscs
- Peak month
- October
- Records since 2000
- 648
Hermit Crab
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 15,388
Hermit crab
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 251
Herring Gull
- Group
- Birds
- Peak month
- April
- Records since 2000
- 1,031,320
Herring-bone Hydroid
- Group
- Jellyfish, corals and anemones
- Peak month
- July
- Records since 2000
- 2,909
Herteliana gagei
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 91
Hesionura elongata
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 1,682
Hesiospina aurantiaca
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 652
Hesperocodon hederaceus
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 264
Hesperocorixa castanea
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 429
Hesperocorixa linnaei
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 1,508
Hesperocorixa moesta
- Group
- True bugs
- Peak month
- April
- Records since 2000
- 303
Hesperocorixa sahlbergi
- Group
- True bugs
- Peak month
- October
- Records since 2000
- 2,758
Heterarthrus fiora
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 355
Heterarthrus microcephalus
- Group
- Bees, wasps and ants
- Peak month
- September
- Records since 2000
- 74
Heterarthrus vagans
- Group
- Bees, wasps and ants
- Peak month
- October
- Records since 2000
- 302
Heterarthrus wuestneii
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 147
Heterocapsa triquetra
- Group
- Microorganisms and protists
- Peak month
- July
- Records since 2000
- 139
Heterocerus fenestratus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 146
Heterocerus marginatus
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 65
Heterocheila buccata
- Group
- True flies
- Peak month
- June
- Records since 2000
- 98
Heterocladium flaccidum
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 922
Heterocladium wulfsbergii
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 417
Heteroclymene robusta
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 528
Heterocordylus tibialis
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 226
Heteromysis formosa
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 123
Heteromyza commixta
- Group
- True flies
- Peak month
- April
- Records since 2000
- 107
Heteromyza oculata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 102
Heteromyza rotundicornis
- Group
- True flies
- Peak month
- June
- Records since 2000
- 376
Heteroradulum deglubens
- Group
- Fungi
- Peak month
- November
- Records since 2000
- 158
Heterosiphonia plumosa
- Group
- Seaweeds and algae
- Peak month
- August
- Records since 2000
- 3,551
Heterosphaeria patella
- Group
- Fungi
- Peak month
- May
- Records since 2000
- 94
Heterostylodes nominabilis
- Group
- True flies
- Peak month
- May
- Records since 2000
- 51
Heterotanais oerstedii
- Group
- Crustaceans
- Peak month
- April
- Records since 2000
- 55
Heterotanytarsus apicalis
- Group
- True flies
- Peak month
- April
- Records since 2000
- 275
Heterotrissocladius marcidus
- Group
- True flies
- Peak month
- May
- Records since 2000
- 146
Hexadella racovitzai
- Group
- Sponges
- Peak month
- July
- Records since 2000
- 59
Hexasterias problematica
- Group
- Seaweeds and algae
- Peak month
- June
- Records since 2000
- 63
Hexatoma fuscipennis
- Group
- True flies
- Peak month
- May
- Records since 2000
- 80
Hiatella rugosa
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 56
Hidcote comfrey
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 315
Hidden Goldspeck Lichen
- Group
- Lichens
- Peak month
- August
- Records since 2000
- 3,160
Hieracium lachenalii
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 389
Hieracium maculatum
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 80
Hieracium murorum
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 202
Hieroglyphic Lady Beetle
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 622
High Brown Fritillary
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 7,234
Highland Saxifrage
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 55
Highly pathogenic H5 avian influenza
- Group
- Microorganisms and protists
- Peak month
- June
- Records since 2000
- 2,715
Hilaira excisa
- Group
- Spiders
- Peak month
- August
- Records since 2000
- 63
Hilara anglodanica
- Group
- True flies
- Peak month
- June
- Records since 2000
- 56
Hilara chorica
- Group
- True flies
- Peak month
- July
- Records since 2000
- 566
Hilara cornicula
- Group
- True flies
- Peak month
- May
- Records since 2000
- 112
Hilara hybrida
- Group
- True flies
- Peak month
- May
- Records since 2000
- 87
Hilara litorea
- Group
- True flies
- Peak month
- July
- Records since 2000
- 300
Hilara longifurca
- Group
- True flies
- Peak month
- June
- Records since 2000
- 83
Hilara longivittata
- Group
- True flies
- Peak month
- June
- Records since 2000
- 129
Hilara manicata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 95
Hilara maura
- Group
- True flies
- Peak month
- May
- Records since 2000
- 196
Hilara nigrina
- Group
- True flies
- Peak month
- July
- Records since 2000
- 51
Hilara obscura
- Group
- True flies
- Peak month
- June
- Records since 2000
- 78
Hilara platyura
- Group
- True flies
- Peak month
- June
- Records since 2000
- 70
Hilara quadrifasciata
- Group
- True flies
- Peak month
- June
- Records since 2000
- 70
Hilara rejecta
- Group
- True flies
- Peak month
- July
- Records since 2000
- 56
Hilbigneris gracilis
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 16,251
Hildenbrandia rivularis
- Group
- Seaweeds and algae
- Peak month
- July
- Records since 2000
- 903
Hill Cuckoo-Bee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 2,434
Hill Notchwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 945
Himalaya blackberry
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 1,303
Himalayan cotoneaster
- Group
- Flowering plants
- Peak month
- September
- Records since 2000
- 1,073
Himalayan Honeysuckle
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 10,314
Himantidium minus
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 300
Hincksia granulosa
- Group
- Seaweeds and algae
- Peak month
- July
- Records since 2000
- 78
Hincksina flustroides
- Group
- Bryozoans
- Peak month
- September
- Records since 2000
- 342
Hippasteria phrygiana
- Group
- Starfish and sea urchins
- Peak month
- August
- Records since 2000
- 420
Hippobosca equina
- Group
- True flies
- Peak month
- July
- Records since 2000
- 81
Hippodonta capitata
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 239
Hippomedon denticulatus
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 1,665
Hippoporina pertusa
- Group
- Bryozoans
- Peak month
- January
- Records since 2000
- 371
Hippothoa divaricata
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 1,219
Hippothoa flagellum
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 744
Hippuriphila modeeri
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 113
Hirta Beetle
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 4,861
Hirtodrosophila cameraria
- Group
- True flies
- Peak month
- August
- Records since 2000
- 78
Hirtodrosophila confusa
- Group
- True flies
- Peak month
- August
- Records since 2000
- 53
Hispid needle lichen
- Group
- Lichens
- Peak month
- February
- Records since 2000
- 120
Hister unicolor
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 72
Hoary Bell
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 2,019
Hoary Cinquefoil
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 210
Hoary Cress
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 2,329
Hoary Footman
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 477
Hoary Grimmia
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 100
Hoary Mullein
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 186
Hoary Mustard
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 814
Hoary Plantain
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,534
Hoary Ragwort
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 2,595
Hoary Rosette Lichen
- Group
- Lichens
- Peak month
- April
- Records since 2000
- 2,424
Hoary Whitlowgrass
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 113
Hoary Willowherb
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 3,116
Hobaniella longicruris
- Group
- Seaweeds and algae
- Peak month
- May
- Records since 2000
- 52
Hochstetter's map lichen
- Group
- Lichens
- Peak month
- September
- Records since 2000
- 131
Hochstetter's wart lichen
- Group
- Fungi
- Peak month
- June
- Records since 2000
- 2,029
Hogweed
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 38,903
Hohenbuehelia atrocoerulea
- Group
- Fungi
- Peak month
- November
- Records since 2000
- 56
Hohenbuehelia cyphelliformis
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 72
Holcostethus strictus
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 133
Hollowsnout grenadier
- Group
- Fish
- Peak month
- November
- Records since 2000
- 931
Holly
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 32,893
Holly Fern
- Group
- Ferns and horsetails
- Peak month
- May
- Records since 2000
- 146
Holly Leaf Gall Fly
- Group
- True flies
- Peak month
- April
- Records since 2000
- 4,934
Holly Parachute
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 291
Holly pins
- Group
- Fungi
- Peak month
- April
- Records since 2000
- 540
Holly Speckle
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 1,602
Holly Tortrix
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 683
Holly-leaved naiad
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 70
Hollyberry Cotoneaster
- Group
- Flowering plants
- Peak month
- September
- Records since 2000
- 1,368
Hollyhock
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 1,519
Hollyhock Rust
- Group
- Fungi
- Peak month
- June
- Records since 2000
- 1,164
Holocentropus dubius
- Group
- Caddisflies
- Peak month
- June
- Records since 2000
- 296
Holocentropus picicornis
- Group
- Caddisflies
- Peak month
- August
- Records since 2000
- 486
Holocentropus stagnalis
- Group
- Caddisflies
- Peak month
- August
- Records since 2000
- 89
Holoneurus paneliusi
- Group
- True flies
- Peak month
- July
- Records since 2000
- 58
Holotrichapion aethiops
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 68
Holotrichapion ononis
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 148
Holotrichapion pisi
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 179
Holt notchwort
- Group
- Liverworts
- Peak month
- May
- Records since 2000
- 71
Holt's Mouse-tail Moss
- Group
- Mosses
- Peak month
- August
- Records since 2000
- 543
Homaxinella subdola
- Group
- Sponges
- Peak month
- September
- Records since 2000
- 283
Homolaphlyctis polyrhiza
- Group
- Fungi
- Peak month
- January
- Records since 2000
- 124
Homoneura interstincta
- Group
- True flies
- Peak month
- June
- Records since 2000
- 59
Homoneura notata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 60
Homophron spadiceum
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 126
Homoporus nypsius
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 64
Homostegia piggotii
- Group
- Fungi
- Peak month
- May
- Records since 2000
- 186
Homotropus pallipes
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 160
Homotropus signatus
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 50
Honesty
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 4,830
Honey Fungus
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,374
Honey Waxcap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,491
Honeycomb Worm
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 5,154
Honeysuckle
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 13,575
Honeysuckle Moth
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 793
Honeysuckle Rash
- Group
- Fungi
- Peak month
- July
- Records since 2000
- 86
Honeywort
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 62
Hooded Bristle-moss
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 2,218
Hooded Crow
- Group
- Birds
- Peak month
- May
- Records since 2000
- 56,265
Hooded Merganser
- Group
- Birds
- Peak month
- May
- Records since 2000
- 519
Hooded Rosette Lichen
- Group
- Lichens
- Peak month
- March
- Records since 2000
- 7,205
Hook-barred Spearhorn
- Group
- True flies
- Peak month
- July
- Records since 2000
- 1,866
Hook-beak Tufa-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 462
Hook-lobed Dandelion
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 91
Hook-nose
- Group
- Fish
- Peak month
- September
- Records since 2000
- 18,129
Hook-winged tortrix moth
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 126
Hooked Scorpion-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 1,824
Hop
- Group
- Flowering plants
- Peak month
- September
- Records since 2000
- 4,303
Hop Trefoil
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,721
Hoplitis claviventris
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 144
Hoplocampa chrysorrhoea
- Group
- Bees, wasps and ants
- Peak month
- April
- Records since 2000
- 52
Hoplocampa crataegi
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 109
Hoplocampa pectoralis
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 70
Hoplolabis areolata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 58
Hoplolabis vicina
- Group
- True flies
- Peak month
- June
- Records since 2000
- 65
Hoplomachus thunbergii
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 67
Hordeum distichon
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 193
Hormathia coronata
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 189
Hornbeam
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 5,848
Horned delphacid
- Group
- True bugs
- Peak month
- April
- Records since 2000
- 461
Horned Grebe
- Group
- Birds
- Peak month
- January
- Records since 2000
- 13,082
Horned Lark
- Group
- Birds
- Peak month
- January
- Records since 2000
- 3,926
Horned Pondweed
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 246
Horned Tree Hopper
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 675
Horned Wrack
- Group
- Seaweeds and algae
- Peak month
- October
- Records since 2000
- 585
Hornet Hoverfly
- Group
- True flies
- Peak month
- August
- Records since 2000
- 8,755
Hornet Moth
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 83
Hornet Robberfly
- Group
- True flies
- Peak month
- August
- Records since 2000
- 1,628
Hornhand Sedgesitter
- Group
- True flies
- Peak month
- August
- Records since 2000
- 2,435
Hornschuch's Beard-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 7,311
Hornwort
- Group
- Hornworts
- Peak month
- October
- Records since 2000
- 310
Hornwrack
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 14,805
Horny Orb Mussel
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 2,423
Horse Bot Fly
- Group
- True flies
- Peak month
- August
- Records since 2000
- 61
Horse chestnut
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 135
Horse leech
- Group
- Worms (annelids)
- Peak month
- May
- Records since 2000
- 197
Horse Mushroom
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 535
Horse-chestnut [tree]
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 15,030
Horse-chestnut leafminer
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 3,386
Horse-Hair Fungus
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 539
Horse-mussel
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 3,571
Horse-radish
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 2,856
Horsehair lichen
- Group
- Lichens
- Peak month
- June
- Records since 2000
- 173
Horseman anemone
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 1,088
Horseshoe Vetch
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 982
Horsetail Weevil
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 149
Hortaea werneckii
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 1,620
Hortiboletus engelii
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 229
Hottentot fig
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 268
Hound's-tongue
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 1,679
House Cricket
- Group
- Grasshoppers and crickets
- Peak month
- August
- Records since 2000
- 227
House fly
- Group
- True flies
- Peak month
- August
- Records since 2000
- 983
House fly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 758
House fly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 453