Species |
First sighting 2020 |
First sighting 2019 |
| Peacock | 29th January | 14th February |
| Small Tortoiseshell | 1st January | 14th February |
| Red Admiral | 29th January | 8th January |
| Comma | 11th March | 11th February |
| Brimstone | 14th February | 13th February |
| Small White | 22nd March | 25th February |
| Green-veined White | 7th April | 30th March |
| Orange Tip | 24th March | 24th March |
| Holly Blue | 3rd April | 25th March |
| Speckled Wood | 5th April | 28th March |
| Large White | 25th March | 24th March |
| Dingy Skipper | 16th April | 17th April |
| Grizzled Skipper | 15th April | 17th April |
| Green Hairstreak | 17th April | 17th April |
| Painted Lady | 25th April | 23rd February |
| Small Heath | 5th May | 19th April |
| Small Copper | 25th April | 18th April |
| Common Blue | 22nd April | 30th April |
| Brown Argus | 5th May | 30th April |
| Wood White | 2nd May | 10th May |
| Large Skipper | 19th May | 29th May |
| Marbled White | 1st June | 19th June |
| Black Hairstreak | 27th May | 4th June |
| Meadow Brown | 27th May | 2nd June |
| Ringlet | 29th May | 1st June |
| Dark Green Fritillary | 28th May | 20th June |
| Small Skipper | 31st May | 21st June |
| Essex Skipper | 24th June | 23rd June |
| White Admiral | 13th June | 22nd June |
| Purple Emperor | 21st June | 1st July |
| Gatekeeper | 21st June | 4th July |
| Purple Hairstreak | 16th June | 3rd July |
| Silver-washed Fritillary | 9th June | 18th June |
| White-letter Hairstreak | 13th June | 23rd June |
| Brown Hairstreak | No sighting | |
| Clouded Yellow | 22nd May | 16th July |
| Chalkhill Blue | No sighting | |
| Monarch | No sighting | |
| Camberwell Beauty | No sighting |