Black-headed Gull
- Group
- Birds
- Peak month
- January
- Records since 2000
- 1,071,610
Described in 1766
91 species
Little Egret/Western Reef-Heron
- Group
- Birds
- Peak month
- August
- Records since 2000
- 428,078
European Stonechat
- Group
- Birds
- Peak month
- October
- Records since 2000
- 226,385
Egyptian Goose
- Group
- Birds
- Peak month
- April
- Records since 2000
- 176,148
Sand Mason
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 17,483
Dark Arches
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 16,454
Hen Harrier
- Group
- Birds
- Peak month
- January
- Records since 2000
- 14,659
Glossy Ibis
- Group
- Birds
- Peak month
- September
- Records since 2000
- 9,557
Tawny Mining Bee
- Group
- Bees, wasps and ants
- Peak month
- April
- Records since 2000
- 8,881
Buff ermine
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 7,977
Bread-crumb sponge
- Group
- Sponges
- Peak month
- September
- Records since 2000
- 6,532
Star Ascidian, Star tunicate, Golden star sea-squirt
- Group
- Sea squirts
- Peak month
- August
- Records since 2000
- 6,456
Fourbeard rockling
- Group
- Fish
- Peak month
- August
- Records since 2000
- 6,440
Clouded Drab
- Group
- Butterflies and moths
- Peak month
- April
- Records since 2000
- 6,269
Spectacle
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 5,896
Treble Lines
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 5,836
Square-spotted Clay
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 5,521
Cellepora pumicosa
- Group
- Bryozoans
- Peak month
- July
- Records since 2000
- 5,108
Heart and Club
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 4,700
Pink Sea Fan
- Group
- Jellyfish, corals and anemones
- Peak month
- July
- Records since 2000
- 4,164
Marbled Beauty
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 3,570
Straw Underwing
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 3,349
Mottled Rustic
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 3,253
Feather bryozoan
- Group
- Bryozoans
- Peak month
- July
- Records since 2000
- 3,209
Clouded-bordered Brindle
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 2,687
Gattyana cirrhosa
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 2,528
Microporella ciliata
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 2,506
Rustic Shoulder-knot
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 2,279
Mud shrimp
- Group
- Crustaceans
- Peak month
- June
- Records since 2000
- 2,001
Narrow-leaved hornwrack
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 1,913
Red-footed Falcon
- Group
- Birds
- Peak month
- May
- Records since 2000
- 1,755
Least weasel
- Group
- Mammals
- Peak month
- August
- Records since 2000
- 1,725
Satellite
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 1,576
Dark Sword-grass
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 1,433
Light Brocade
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 1,428
Purple Heron
- Group
- Birds
- Peak month
- May
- Records since 2000
- 1,397
Spotted Crake
- Group
- Birds
- Peak month
- August
- Records since 2000
- 1,397
Lychnis
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 1,373
Pale-shouldered Brocade
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 1,347
Eurasian pygmy shrew
- Group
- Mammals
- Peak month
- July
- Records since 2000
- 1,240
Marbled White Spot
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 1,180
Sallow [moth]
- Group
- Butterflies and moths
- Peak month
- September
- Records since 2000
- 1,132
Lunar Marbled Brown
- Group
- Butterflies and moths
- Peak month
- April
- Records since 2000
- 1,028
Spotted Sandpiper
- Group
- Birds
- Peak month
- May
- Records since 2000
- 997
Clover Cutworm
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 984
Striped seasnail, Sea-snail
- Group
- Fish
- Peak month
- February
- Records since 2000
- 871
Grey Arches
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 845
Ross Coral
- Group
- Bryozoans
- Peak month
- January
- Records since 2000
- 823
Toadflax Brocade
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 773
Blue-winged Teal
- Group
- Birds
- Peak month
- April
- Records since 2000
- 714
Tall Sea Pen
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 698
European Serin
- Group
- Birds
- Peak month
- May
- Records since 2000
- 688
Semipalmated Sandpiper
- Group
- Birds
- Peak month
- August
- Records since 2000
- 660
Golf ball sponge
- Group
- Sponges
- Peak month
- August
- Records since 2000
- 636
Brick
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 623
Pale Pinion
- Group
- Butterflies and moths
- Peak month
- April
- Records since 2000
- 565
Grey Shoulder-Knot
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 531
Sprawler
- Group
- Butterflies and moths
- Peak month
- November
- Records since 2000
- 512
The sallow
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 494
Collared Pratincole
- Group
- Birds
- Peak month
- June
- Records since 2000
- 486
Broad-barred white
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 451
Archers dart
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 409
American Robin
- Group
- Birds
- Peak month
- February
- Records since 2000
- 386
Red-eyed vireo
- Group
- Birds
- Peak month
- October
- Records since 2000
- 368
Obelia longissima
- Group
- Jellyfish, corals and anemones
- Peak month
- June
- Records since 2000
- 326
Graphosoma italicum
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 305
Idotea chelipes
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 264
Tubulipora liliacea
- Group
- Bryozoans
- Peak month
- January
- Records since 2000
- 249
Pectinaria belgica
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 235
Orchestia gammarellus
- Group
- Crustaceans
- Peak month
- June
- Records since 2000
- 220
Marbled coronet
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 212
Myrtle Warbler
- Group
- Birds
- Peak month
- February
- Records since 2000
- 208
Festoon
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 204
Red-footed Booby
- Group
- Birds
- Peak month
- August
- Records since 2000
- 201
Sooty Tern
- Group
- Birds
- Peak month
- July
- Records since 2000
- 167
Einhornia crustulenta
- Group
- Bryozoans
- Peak month
- April
- Records since 2000
- 153
The brick
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 153
Crenobia alpina
- Group
- Flatworms
- Peak month
- April
- Records since 2000
- 143
African Stonechat
- Group
- Birds
- Peak month
- April
- Records since 2000
- 118
Rufous-tailed Rock Thrush
- Group
- Birds
- Peak month
- October
- Records since 2000
- 117
Gray Catbird
- Group
- Birds
- Peak month
- October
- Records since 2000
- 108
Bordered sallow
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 98
Alexandrine Parakeet
- Group
- Birds
- Peak month
- November
- Records since 2000
- 95
Echiurus echiurus
- Group
- Worms (annelids)
- Peak month
- May
- Records since 2000
- 83
Common Yellowthroat
- Group
- Birds
- Peak month
- February
- Records since 2000
- 76
White-faced Whistling-duck
- Group
- Birds
- Peak month
- April
- Records since 2000
- 75
Lunar Yellow Underwing
- Group
- Butterflies and moths
- Peak month
- September
- Records since 2000
- 67
Clostera pigra
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 66
Indigo Bunting
- Group
- Birds
- Peak month
- May
- Records since 2000
- 64
Canada Warbler
- Group
- Birds
- Peak month
- September
- Records since 2000
- 60
A hydroid
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 50