Isle of Anglesey — county
- Group
- Caddisflies
- Peak month
- May
- Records since 2000
- 5,775
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 5,769
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 5,759
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 5,714
- Group
- True flies
- Peak month
- August
- Records since 2000
- 5,653
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 5,653
- Group
- Caddisflies
- Peak month
- August
- Records since 2000
- 5,591
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 5,535
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 5,478
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 5,432
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 5,384
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 5,335
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 5,306
- Group
- True flies
- Peak month
- May
- Records since 2000
- 5,213
- Group
- Dragonflies and damselflies
- Peak month
- June
- Records since 2000
- 5,148
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 5,135
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 5,079
- Group
- True flies
- Peak month
- July
- Records since 2000
- 5,065
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 5,005
- Group
- Flowering plants
- Peak month
- August
- Records since 2000
- 4,982
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,894
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 4,861
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 4,790
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 4,722
- Group
- Flowering plants
- Peak month
- May
- Records since 2000
- 4,703
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 4,676
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 4,644
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 4,638
- Group
- Mosses
- Peak month
- July
- Records since 2000
- 4,629
- Group
- Molluscs
- Peak month
- September
- Records since 2000
- 4,616
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 4,601
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 4,578
- Group
- Mosses
- Peak month
- November
- Records since 2000
- 4,567
- Group
- Liverworts
- Peak month
- March
- Records since 2000
- 4,557
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 4,527
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 4,520
- Group
- True flies
- Peak month
- July
- Records since 2000
- 4,512
- Group
- Caddisflies
- Peak month
- May
- Records since 2000
- 4,503
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 4,490
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 4,456
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 4,452
- Group
- Mayflies
- Peak month
- April
- Records since 2000
- 4,445
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 4,391
- Group
- Beetles
- Peak month
- April
- Records since 2000
- 4,365
- Group
- True flies
- Peak month
- May
- Records since 2000
- 4,355
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 4,304
- Group
- Seaweeds and algae
- Peak month
- August
- Records since 2000
- 4,248
- Group
- Fungi
- Peak month
- October
- Records since 2000
- 4,247