Spiny Lobster
- Group
- Crustaceans
- Peak month
- June
- Records since 2000
- 979
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- Biodiversity List – Wales
Biodiversity List – Wales
364 species
Fragrant Orchid
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 938
August Thorn
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 903
Northern Deep-brown Dart
- Group
- Butterflies and moths
- Peak month
- September
- Records since 2000
- 896
Large Garden Bumble Bee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 889
Tubular Water-dropwort
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 801
Large Hook-moss
- Group
- Mosses
- Peak month
- May
- Records since 2000
- 791
Globeflower
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 787
White-beaked dolphin
- Group
- Mammals
- Peak month
- July
- Records since 2000
- 769
Large Wainscot
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 725
Stag's-horn Clubmoss
- Group
- Clubmosses
- Peak month
- July
- Records since 2000
- 721
Frog Orchid
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 717
Small Emerald
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 695
European smelt, Smelt
- Group
- Fish
- Peak month
- September
- Records since 2000
- 684
European chickweed
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 682
Small White-line Dart
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 665
Orca
- Group
- Mammals
- Peak month
- May
- Records since 2000
- 647
Grey Tooth
- Group
- Fungi
- Peak month
- September
- Records since 2000
- 632
Minor Shoulder-knot
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 608
Woolly Tooth
- Group
- Fungi
- Peak month
- August
- Records since 2000
- 607
Lesser Butterfly-orchid
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 606
Twaite Shad
- Group
- Fish
- Peak month
- February
- Records since 2000
- 599
Red-tailed Carder Bee
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 583
Risso's dolphin
- Group
- Mammals
- Peak month
- August
- Records since 2000
- 581
Northern Dune Tiger Beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 563
Prostrate Signal-moss
- Group
- Mosses
- Peak month
- June
- Records since 2000
- 554
Ear Moth
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 545
Feathered Gothic
- Group
- Butterflies and moths
- Peak month
- September
- Records since 2000
- 545
Dark Brocade
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 527
Ridged Tooth
- Group
- Fungi
- Peak month
- September
- Records since 2000
- 526
Florida beard lichen
- Group
- Lichens
- Peak month
- October
- Records since 2000
- 525
River Jelly Lichen
- Group
- Lichens
- Peak month
- September
- Records since 2000
- 524
Sprawler
- Group
- Butterflies and moths
- Peak month
- November
- Records since 2000
- 512
Bellicidia incompta
- Group
- Lichens
- Peak month
- March
- Records since 2000
- 511
Haworth's Minor
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 506
Heath Rustic
- Group
- Butterflies and moths
- Peak month
- September
- Records since 2000
- 495
Marsh Clubmoss
- Group
- Clubmosses
- Peak month
- September
- Records since 2000
- 494
European river lamprey, River Lamprey
- Group
- Fish
- Peak month
- September
- Records since 2000
- 493
Double Dart
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 485
Greater Copperwort
- Group
- Liverworts
- Peak month
- January
- Records since 2000
- 483
Sand lizard
- Group
- Reptiles
- Peak month
- April
- Records since 2000
- 450
Neglected rustic
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 447
A long-horned bee
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 438
Hypotrachyna horrescens
- Group
- Lichens
- Peak month
- May
- Records since 2000
- 427
Hedge rustic
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 412
Natterjack toad
- Group
- Amphibians
- Peak month
- April
- Records since 2000
- 406
Rosy minor
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 402
Oblique carpet
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 399