Species |
First sighting 2021 |
First sighting 2020 |
| Peacock | 10th January | 29th January |
| Small Tortoiseshell | 22nd January | 1st January |
| Red Admiral | 22nd January | 29th January |
| Comma | 24th February | 11th March |
| Brimstone | 22nd January | 14th February |
| Small White | 24th March | 22nd March |
| Green-veined White | 4th April | 7th April |
| Orange-tip | 30th March | 24th March |
| Holly Blue | 30th March | 3rd April |
| Speckled Wood | 13th April | 5th April |
| Large White | 31st March | 25th March |
| Dingy Skipper | 27th April | 16th April |
| Grizzled Skipper | 19th April | 15th April |
| Green Hairstreak | 20th April | 17th April |
| Painted Lady | 13th April | 25th April |
| Small Heath | 12th May | 5th May |
| Small Copper | 16th May | 25th April |
| Common Blue | 18th May | 22nd April |
| Brown Argus | 29th May | 5th May |
| Wood White | 16th May | 2nd May |
| Large Skipper | 9th June | 19th May |
| Marbled White | 23rd June | 1st June |
| Black Hairstreak | 12th June | 27th May |
| Meadow Brown | 11th June | 27th May |
| Ringlet | 26th June | 29th May |
| Dark Green Fritillary | 23rd June | 28th May |
| Small Skipper | 17th June | 31st May |
| Essex Skipper | 23rd June | 24th June |
| White Admiral | 2nd July | 13th June |
| Purple Emperor | 2nd July | 21st June |
| Gatekeeper | 5th July | 21st June |
| Purple Hairstreak | 1st July | 16th June |
| Silver-washed Fritillary | 1st July | 9th June |
| White-letter Hairstreak | 24th June | 13th June |
| Brown Hairstreak | ||
| Clouded Yellow | 19th July | 22nd May |
| Chalkhill Blue | ||
| Monarch | ||
| Camberwell Beauty |