Isle of Anglesey — county
- Group
- True flies
- Peak month
- July
- Records since 2000
- 10,244
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 10,169
- Group
- Ferns and horsetails
- Peak month
- June
- Records since 2000
- 9,954
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 9,856
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 9,811
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 9,736
- Group
- True flies
- Peak month
- June
- Records since 2000
- 9,719
- Group
- Mosses
- Peak month
- January
- Records since 2000
- 9,711
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 9,710
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 9,703
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 9,683
- Group
- True flies
- Peak month
- May
- Records since 2000
- 9,678
- Group
- True flies
- Peak month
- August
- Records since 2000
- 9,660
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 9,640
- Group
- Liverworts
- Peak month
- April
- Records since 2000
- 9,606
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 9,453
- Group
- Dragonflies and damselflies
- Peak month
- June
- Records since 2000
- 9,278
- Group
- Dragonflies and damselflies
- Peak month
- June
- Records since 2000
- 9,257
- Group
- True flies
- Peak month
- June
- Records since 2000
- 9,218
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 9,179
- Group
- Bees, wasps and ants
- Peak month
- April
- Records since 2000
- 9,008
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 8,973
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 8,938
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 8,933
- Group
- Bees, wasps and ants
- Peak month
- April
- Records since 2000
- 8,881
- Group
- True flies
- Peak month
- June
- Records since 2000
- 8,814
- Group
- Fish
- Peak month
- October
- Records since 2000
- 8,795
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 8,781
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 8,771
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 8,765
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 8,764
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 8,719
- Group
- True flies
- Peak month
- July
- Records since 2000
- 8,563
- Group
- Liverworts
- Peak month
- July
- Records since 2000
- 8,512
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 8,502
- Group
- True flies
- Peak month
- June
- Records since 2000
- 8,496
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 8,473
- Group
- Jellyfish, corals and anemones
- Peak month
- July
- Records since 2000
- 8,403
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 8,320
- Group
- Caddisflies
- Peak month
- April
- Records since 2000
- 8,270
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 8,262
- Group
- True flies
- Peak month
- August
- Records since 2000
- 8,261
- Group
- Bees, wasps and ants
- Peak month
- April
- Records since 2000
- 8,242
- Group
- Beetles
- Peak month
- September
- Records since 2000
- 8,233
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 8,145
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 8,145
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 8,142
- Group
- True flies
- Peak month
- July
- Records since 2000
- 8,117