Wachtliella persicariae
- Group
- True flies
- Peak month
- August
- Records since 2000
- 118
Wachtliella rosae
- Group
- True flies
- Peak month
- August
- Records since 2000
- 175
Wahlenbergiella mucosa
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 960
Wahlenbergiella striatula
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 62
Wainscot Smudge
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 609
Waisted Beegrabber
- Group
- True flies
- Peak month
- July
- Records since 2000
- 1,075
Waisted Duckfly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 513
Walckenaeria acuminata
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 159
Walckenaeria antica
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 155
Walckenaeria atrotibialis
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 62
Walckenaeria nudipalpis
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 63
Walckenaeria unicornis
- Group
- Spiders
- Peak month
- May
- Records since 2000
- 128
Walckenaeria vigilax
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 70
Walkeria uva
- Group
- Bryozoans
- Peak month
- September
- Records since 2000
- 171
Wall
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 43,859
Wall Barley
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 3,773
Wall Bedstraw
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 69
Wall Cotoneaster
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 2,486
Wall Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 1,516
Wall Germander
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 205
Wall Lettuce
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,982
Wall Mason Bee
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 85
Wall Mason Wasp
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 112
Wall Scalewort
- Group
- Liverworts
- Peak month
- March
- Records since 2000
- 3,323
Wall Screw-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 24,717
Wall Speck Lichen
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 2,091
Wall Speedwell
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 5,380
Wall thread-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 2,514
Wall-rue
- Group
- Ferns and horsetails
- Peak month
- April
- Records since 2000
- 5,522
Wallemia sebi
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 1,085
Wallflower
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 963
Walnut
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 4,332
Walnut Blister Mite
- Group
- Mites, harvestmen and other arachnids
- Peak month
- August
- Records since 2000
- 477
Wandering Snail
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 7,038
Warnstorf's sphagnum
- Group
- Mosses
- Peak month
- October
- Records since 2000
- 361
Wart Barnacle
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 4,206
Wart lichen
- Group
- Fungi
- Peak month
- June
- Records since 2000
- 2,571
Wart lichen
- Group
- Fungi
- Peak month
- June
- Records since 2000
- 1,910
Wart lichen
- Group
- Fungi
- Peak month
- July
- Records since 2000
- 1,680
Wart lichen
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 1,106
Wart lichen
- Group
- Fungi
- Peak month
- May
- Records since 2000
- 639
Wart lichen
- Group
- Fungi
- Peak month
- July
- Records since 2000
- 360
Wart lichen
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 282
Wart lichen
- Group
- Fungi
- Peak month
- June
- Records since 2000
- 158
Wart lichen
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 150
Wart lichen
- Group
- Fungi
- Peak month
- May
- Records since 2000
- 119
Wart lichen
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 60
Wart lichen
- Group
- Fungi
- Peak month
- November
- Records since 2000
- 57
Wart-biter grasshopper
- Group
- Grasshoppers and crickets
- Peak month
- August
- Records since 2000
- 96
Warty Arion
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 1,582
Warty brown-shield
- Group
- Lichens
- Peak month
- March
- Records since 2000
- 572
Wasp Beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 4,967
Wasp Spider
- Group
- Spiders
- Peak month
- August
- Records since 2000
- 613
Water Avens
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 3,609
Water Bent
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 1,207
Water Carpet
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 1,359
Water Chickweed
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 780
Water Dock
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 1,458
Water Earwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 8,368
Water Fern, Fairy moss
- Group
- Ferns and horsetails
- Peak month
- September
- Records since 2000
- 1,775
Water Figwort
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,605
Water Forget-me-not
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 3,657
Water Grimmia
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 159
Water hog lice/slaters
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 3,172
Water Horsetail
- Group
- Ferns and horsetails
- Peak month
- July
- Records since 2000
- 3,492
Water Lobelia
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 258
Water measurer
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 3,544
Water Mint
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 11,367
Water Pipit
- Group
- Birds
- Peak month
- January
- Records since 2000
- 11,870
Water Purslane
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 530
Water Rail
- Group
- Birds
- Peak month
- January
- Records since 2000
- 93,917
Water Scorpion, Water bug
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 3,101
Water Screw-moss
- Group
- Mosses
- Peak month
- January
- Records since 2000
- 3,728
Water Sedge
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 65
Water Stick Insect
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 1,036
Water Veneer, Watermilfoil moth
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 2,632
Water-Lily Reed Beetle
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 63
Water-plantain
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 3,208
Water-soldier
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 342
Water-violet
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 598
Watercress
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,659
Waved black
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 277
Waved carpet
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 117
Waved Fork-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 337
Waved Silk-moss
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 10,043
Waved Umber
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 1,304
Wavy Beard-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 4,738
Wavy Bitter-cress
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 6,487
Wavy Hair-grass
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 8,986
Wavy St John's-wort
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 128
Wax Moth
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 514
Waxy Crust
- Group
- Fungi
- Peak month
- January
- Records since 2000
- 756
Waxy Earwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 456
Wayfaring Tree
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 5,181
Weasel's-snout
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 102
Websterinereis glauca
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 244
Weddellomyces epicallopisma
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 89
Wedge Flapwort
- Group
- Liverworts
- Peak month
- February
- Records since 2000
- 550
Weeping Widow
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 967
Weevil
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 1,872
Weevil
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 1,531
Weevil
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 1,310
Weevil
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 1,257
Weevil
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 987
Weevil
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 733
Weevil
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 654
Weevil
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 533
Weigel's bryum moss
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 271
Weissia angustifolia
- Group
- Mosses
- Peak month
- February
- Records since 2000
- 531
Weissia angustifolia
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 82
Weissia perssonii
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 391
Weld
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 3,893
Wels Catfish
- Group
- Fish
- Peak month
- July
- Records since 2000
- 62
Welsh Chafer
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 2,336
Welsh Clearwing
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 108
Welsh Pocket-moss
- Group
- Mosses
- Peak month
- November
- Records since 2000
- 684
Welsh Poppy
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 3,384
Welshman's Button Caddisfly
- Group
- Caddisflies
- Peak month
- April
- Records since 2000
- 22,673
Welted Thistle
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 1,808
Wesmaelius nervosus
- Group
- Lacewings
- Peak month
- June
- Records since 2000
- 75
Western Barbastelle
- Group
- Mammals
- Peak month
- August
- Records since 2000
- 1,201
Western Bee-fly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 513
Western Brook-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 518
Western Capercaillie
- Group
- Birds
- Peak month
- April
- Records since 2000
- 21,473
Western conifer seed bug
- Group
- True bugs
- Peak month
- October
- Records since 2000
- 9,062
Western Earwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 4,917
Western Eyebright
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 118
Western Frostwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 802
Western Gorse
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,129
Western grape rootworm
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 82
Western Hemlock
- Group
- Conifers
- Peak month
- April
- Records since 2000
- 531
Western honey bee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 51,449
Western Jackdaw
- Group
- Birds
- Peak month
- May
- Records since 2000
- 1,084,740
Western Marsh-orchid
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 5,306
Western Pouncewort
- Group
- Liverworts
- Peak month
- March
- Records since 2000
- 3,422
Western Red-cedar
- Group
- Conifers
- Peak month
- January
- Records since 2000
- 819
Western Rustwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 2,470
Western Sandpiper
- Group
- Birds
- Peak month
- July
- Records since 2000
- 377
Western Subalpine Warbler
- Group
- Birds
- Peak month
- April
- Records since 2000
- 202
Western Swamphen
- Group
- Birds
- Peak month
- August
- Records since 2000
- 163
Western waterweed, Nuttall's waterweed
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 12,267
Western Yellow Wagtail
- Group
- Birds
- Peak month
- August
- Records since 2000
- 69,276
Westwoodilla caecula
- Group
- Crustaceans
- Peak month
- October
- Records since 2000
- 1,278
Weymouth carpet coral
- Group
- Jellyfish, corals and anemones
- Peak month
- October
- Records since 2000
- 62
Wharf Borer
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 227
Wheat Flea Beetle
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 746
Wheat Stem Borer
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 465
Whimbrel
- Group
- Birds
- Peak month
- May
- Records since 2000
- 58,553
Whinchat
- Group
- Birds
- Peak month
- September
- Records since 2000
- 28,416
Whirlpool Ramshorn
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 2,334
Whiskered Tern
- Group
- Birds
- Peak month
- May
- Records since 2000
- 470
Whiskered Veilwort
- Group
- Liverworts
- Peak month
- March
- Records since 2000
- 3,874
White abra
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 17,268
White Atlantic Cadlina
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 483
White Beak-sedge
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 500
White Bedstraw
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 3,391
White Brain
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 1,030
White Bryony
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,903
White Campion
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 5,458
White Catworm
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 8,630
White clathrina
- Group
- Sponges
- Peak month
- August
- Records since 2000
- 781
White Clover
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 31,709
White Clover Seed Weevil
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 2,207
White clover weevil
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 773
White comfrey
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 2,573
White Dead-nettle
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 17,320
White Earwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 12,767
White Ermine
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 7,356
White Fibrecap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 2,272
White Frostwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 786
White frostwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 304
White Ghost Catshark
- Group
- Fish
- Peak month
- September
- Records since 2000
- 153
White Helleborine
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 661
White Horehound
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 193
White Letter Hairstreak
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 2,866
White Melilot
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 776
White Mustard
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 311
White panicle aster
- Group
- Flowering plants
- Peak month
- October
- Records since 2000
- 108
White Plume Moth
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 929
White Poplar
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 4,578
White Ramping-fumitory
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 190
White Ramshorn
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 1,347
White Saddle
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 1,327
White Satin
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 776
White Sedge
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 585
White sedge
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 70
White Spindles
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 814
White Stonecrop
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 3,501
White Stork
- Group
- Birds
- Peak month
- May
- Records since 2000
- 3,594
White tit-sponge
- Group
- Sponges
- Peak month
- June
- Records since 2000
- 467
White tortoiseshell limpet
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 1,355
White Violet
- Group
- Flowering plants
- Peak month
- March
- Records since 2000
- 53
White Wagtail
- Group
- Birds
- Peak month
- April
- Records since 2000
- 643,578
White Water-lily
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 1,294
White Willow
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 2,890
White worm
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 304
White's Thrush
- Group
- Birds
- Peak month
- October
- Records since 2000
- 120
White-barred peat hoverfly
- Group
- True flies
- Peak month
- May
- Records since 2000
- 858
White-beaked dolphin
- Group
- Mammals
- Peak month
- July
- Records since 2000
- 769
White-bellied Storm-petrel
- Group
- Birds
- Peak month
- October
- Records since 2000
- 74
White-cheeked Pintail
- Group
- Birds
- Peak month
- May
- Records since 2000
- 91
White-chinned Petrel
- Group
- Birds
- Peak month
- October
- Records since 2000
- 74
White-crowned sparrow
- Group
- Birds
- Peak month
- January
- Records since 2000
- 224
White-edged Stone Lichen
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 1,629
White-faced Darter
- Group
- Dragonflies and damselflies
- Peak month
- June
- Records since 2000
- 3,960
White-faced Storm-petrel
- Group
- Birds
- Peak month
- October
- Records since 2000
- 74
White-faced Whistling-duck
- Group
- Birds
- Peak month
- April
- Records since 2000
- 75
White-footed Furrow Bee
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 932
White-headed duck
- Group
- Birds
- Peak month
- September
- Records since 2000
- 84
White-legged cranefly
- Group
- True flies
- Peak month
- May
- Records since 2000
- 1,333
White-legged Damselfly, Blue featherleg
- Group
- Dragonflies and damselflies
- Peak month
- June
- Records since 2000
- 15,819
White-legged harp ground beetle
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 2,577
White-legged Snake Millipede
- Group
- Millipedes
- Peak month
- April
- Records since 2000
- 1,102
White-lipped Ramshorn
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 818
White-lipped Snail
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 13,376
White-marked
- Group
- Butterflies and moths
- Peak month
- April
- Records since 2000
- 95
White-marked spider beetle
- Group
- Beetles
- Peak month
- January
- Records since 2000
- 84
White-pinion spotted
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 418
White-point
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 674
White-rumped Sandpiper
- Group
- Birds
- Peak month
- August
- Records since 2000
- 1,643
White-shouldered House Moth
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 3,707
White-shouldered Smudge
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 602
White-sided Cleaver
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 604
White-Sided Dolphin
- Group
- Mammals
- Peak month
- July
- Records since 2000
- 208
White-spotted Pug
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 798
White-spotted Sable
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 90
White-tailed Bumble Bee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 40,355
White-tailed Eagle
- Group
- Birds
- Peak month
- August
- Records since 2000
- 11,717
White-tailed Lapwing
- Group
- Birds
- Peak month
- September
- Records since 2000
- 759
White-tailed Tropicbird
- Group
- Birds
- Peak month
- October
- Records since 2000
- 78
White-throated Dipper
- Group
- Birds
- Peak month
- May
- Records since 2000
- 32,318
White-throated sparrow
- Group
- Birds
- Peak month
- April
- Records since 2000
- 184
White-tipped Bristle-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 18,107
White-winged Scoter
- Group
- Birds
- Peak month
- January
- Records since 2000
- 11,818
White-winged scoter
- Group
- Birds
- Peak month
- May
- Records since 2000
- 547
White-winged Tern
- Group
- Birds
- Peak month
- August
- Records since 2000
- 1,194
Whitefish
- Group
- Fish
- Peak month
- July
- Records since 2000
- 53
Whitelaced Shank
- Group
- Fungi
- Peak month
- September
- Records since 2000
- 723
Whitewash Lichen
- Group
- Lichens
- Peak month
- March
- Records since 2000
- 3,483
Whiting
- Group
- Fish
- Peak month
- August
- Records since 2000
- 274,647
Whitish Feather-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 6,743
Whooper Swan
- Group
- Birds
- Peak month
- October
- Records since 2000
- 45,803
Whorl-grass
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 304
Whorled clary
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 245
Whorled Tufa-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 1,632
Whorled Water-milfoil
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 142
Wickerhamomyces anomalus
- Group
- Fungi
- Peak month
- January
- Records since 2000
- 84
Wild Angelica
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 12,214
Wild Basil
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 3,508
Wild boar
- Group
- Mammals
- Peak month
- April
- Records since 2000
- 416
Wild Candytuft
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 183
Wild Cat
- Group
- Mammals
- Peak month
- January
- Records since 2000
- 316
Wild Celery
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 334
Wild Cherry
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 10,464
Wild Clary
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 738
Wild Grape
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 113
Wild Leek
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 78
Wild Liquorice
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 288
Wild Madder
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 456
Wild Marjoram
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 4,725
Wild Mignonette
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,651
Wild Oat
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 1,113
Wild Onion
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 1,630
Wild Pansy
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 725
Wild Parsnip
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 2,489
Wild Privet
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 6,265
Wild Radish
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 2,631
Wild Service-tree
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 1,124
Wild Strawberry
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 6,172
Wild Teasel
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 10,799
Willow Beauty
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 17,291
Willow Bolete
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 317
Willow Brittlegill
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 61
Willow Flea-beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 1,388
Willow Fly
- Group
- Stoneflies
- Peak month
- April
- Records since 2000
- 1,342
Willow Gall Weevil
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 411
Willow Leaf Beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 851
Willow Ptarmigan
- Group
- Birds
- Peak month
- April
- Records since 2000
- 21,736
Willow Shield
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 643
Willow Spittlebug
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 89
Willow Tit
- Group
- Birds
- Peak month
- January
- Records since 2000
- 16,511
Willow Warbler
- Group
- Birds
- Peak month
- April
- Records since 2000
- 223,873
Willow-leaved Cotoneaster
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 609
Willowherb Mildew
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 533
Willowleaf meadowsweet
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 52
Willowsia platani
- Group
- Springtails
- Peak month
- April
- Records since 2000
- 60
Willughby's Leaf-cutter Bee
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 1,040
Wilson's Filmy-fern
- Group
- Ferns and horsetails
- Peak month
- July
- Records since 2000
- 411
Wilson's Phalarope
- Group
- Birds
- Peak month
- September
- Records since 2000
- 681
Wilson's Pouchwort
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 96
Wilson's Snipe
- Group
- Birds
- Peak month
- October
- Records since 2000
- 147
Wilson's Storm-Petrel
- Group
- Birds
- Peak month
- August
- Records since 2000
- 825
Window Fly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 126
Window Gnat
- Group
- True flies
- Peak month
- May
- Records since 2000
- 295
Window Winged Sedge
- Group
- Caddisflies
- Peak month
- June
- Records since 2000
- 234
Winecork Brittlegill
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 1,859
Winter Aconite
- Group
- Flowering plants
- Peak month
- February
- Records since 2000
- 2,816
Winter Creeper
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 2,746
Winter Heliotrope
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 3,719
Winter jasmine
- Group
- Flowering plants
- Peak month
- December
- Records since 2000
- 94
Winter Moth
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 3,872
Winter Polypore
- Group
- Fungi
- Peak month
- April
- Records since 2000
- 503
Winter Shade
- Group
- Butterflies and moths
- Peak month
- February
- Records since 2000
- 506
Winter stalkball
- Group
- Fungi
- Peak month
- November
- Records since 2000
- 257
Winter-cress
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 1,551
Winter-cress
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 90
Wireweed, Japweed, Strangleweed
- Group
- Seaweeds and algae
- Peak month
- June
- Records since 2000
- 3,356
Wisconsin weeping willow
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 99
Witch flounder
- Group
- Fish
- Peak month
- August
- Records since 2000
- 15,412
Witch's hair
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 1,623
Witches' Butter
- Group
- Fungi
- Peak month
- January
- Records since 2000
- 1,788
Witches' Butter
- Group
- Fungi
- Peak month
- December
- Records since 2000
- 921
Woad
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 79
Woldstedtius biguttatus
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 73
Wolf spider
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 442
Wolf's milk Slime
- Group
- Microorganisms and protists
- Peak month
- May
- Records since 2000
- 1,092
Wood Anemone
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 10,279
Wood Ant
- Group
- Bees, wasps and ants
- Peak month
- April
- Records since 2000
- 1,703
Wood Avens
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 26,690
Wood Barley
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 111
Wood Bitter-vetch
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 102
Wood Blewit
- Group
- Fungi
- Peak month
- November
- Records since 2000
- 1,860
Wood Bolete
- Group
- Fungi
- Peak month
- September
- Records since 2000
- 74
Wood Bristle-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 26,382
Wood calamint
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 283
Wood carpet
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 57
Wood Club-rush
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 362
Wood Crane's-bill
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 1,280
Wood Cricket
- Group
- Grasshoppers and crickets
- Peak month
- August
- Records since 2000
- 499
Wood Dock
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 7,910
Wood Duck
- Group
- Birds
- Peak month
- January
- Records since 2000
- 624
Wood Forget-me-not
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 4,355
Wood gnat
- Group
- True flies
- Peak month
- June
- Records since 2000
- 1,709
Wood Hedgehog
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 950
Wood Horsetail
- Group
- Ferns and horsetails
- Peak month
- May
- Records since 2000
- 1,347
Wood Lark
- Group
- Birds
- Peak month
- May
- Records since 2000
- 15,459
Wood Meadow-grass
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 1,094
Wood Melick
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 2,652
Wood Millet
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 1,481
Wood mouse
- Group
- Mammals
- Peak month
- September
- Records since 2000
- 10,137
Wood Pinkgill
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 592
Wood Sage
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 9,132
Wood Sandpiper
- Group
- Birds
- Peak month
- August
- Records since 2000
- 13,506
Wood Small-reed
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 674
Wood Speedwell
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 5,106
Wood Spurge
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 2,898
Wood Stitchwort
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 273
Wood tiger
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 238
Wood vetch
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 284
Wood Warbler
- Group
- Birds
- Peak month
- May
- Records since 2000
- 7,246
Wood White
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 11,917
Wood Woolly-foot
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 1,522
Wood-carving Leaf-cutter Bee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 569
Wood-rust
- Group
- Liverworts
- Peak month
- April
- Records since 2000
- 3,594
Wood-sedge
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 3,912
Wood-sorrel
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 10,549
Woodchat Shrike
- Group
- Birds
- Peak month
- May
- Records since 2000
- 1,274
Woodland Dor Beetle
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 711
Woodland Grasshopper
- Group
- Grasshoppers and crickets
- Peak month
- August
- Records since 2000
- 562
Woodland Red Ant
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 4,639
Woodlouse spider
- Group
- Spiders
- Peak month
- April
- Records since 2000
- 149
Woodruff
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 4,693
Woodsy Silk-moss
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 3,549
Wool-carder Bee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 2,697
Woolly Apple Aphid
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 286
Woolly Beech Aphid
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 401
Woolly Feather-moss
- Group
- Mosses
- Peak month
- October
- Records since 2000
- 219
Woolly Fringe-moss
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 8,619
Woolly hedgenettle
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 291
Woolly hermit crab
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 881
Woolly Milkcap
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 628
Woolly Thistle
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 912
Woolly Tooth
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 607
Woolly Willow
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 53
World Woodlouse Fly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 494
Worm
- Group
- Worms (annelids)
- Peak month
- March
- Records since 2000
- 121
Worm Lichen
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 579
Worm Pipefish
- Group
- Fish
- Peak month
- August
- Records since 2000
- 605
Worm Slug
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 985
Worm Weed
- Group
- Seaweeds and algae
- Peak month
- May
- Records since 2000
- 1,284
Worm-like Sea Cucumber
- Group
- Starfish and sea urchins
- Peak month
- August
- Records since 2000
- 3,034
Wormaldia occipitalis
- Group
- Caddisflies
- Peak month
- July
- Records since 2000
- 1,180
Wormaldia subnigra
- Group
- Caddisflies
- Peak month
- August
- Records since 2000
- 166
Wormwood
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 380
Wormwood Pug
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 1,305
Woundwort Shieldbug
- Group
- True bugs
- Peak month
- May
- Records since 2000
- 4,664
Wrack Siphon Weed
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 1,326
Wrinkle-leaved feather-moss
- Group
- Mosses
- Peak month
- December
- Records since 2000
- 242
Wrinkled Club
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 930
Wrinkled Peach
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 498
Wrinkled Rock Borer
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 4,289
Wrinkled Snail
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 2,323
Wry-leaved Tamarisk-moss
- Group
- Mosses
- Peak month
- April
- Records since 2000
- 2,759
Wych Elm
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 6,614