Hertfordshire & Middlesex Branch
Saving butterflies, moths and our environment
Last updated 26 February 2026
First and last sightings in 2014-2023
Butterfly Conservation First Sightings 2026
| Species | 2015-24 average | 2025 | 2026 |
|---|---|---|---|
| Adonis Blue | 24 May ⁰ | 13 May | |
| Brimstone | 28 January | 29 January | 14 January |
| Brown Argus | 3 May | 17 April | |
| Brown Hairstreak | 19 July ⁱ | 1 July | |
| Camberwell Beauty | |||
| Chalk Hill Blue | 29 June | 25 June | |
| Clouded Yellow | 10 June | 10 May | |
| Comma | 6 February | 8 February | 4 February |
| Common Blue | 3 May | 23 April | |
| Dark Green Fritillary | 21 June | 1 June | |
| Dingy Skipper | 3 May | 25 April | |
| Essex Skipper | 19 June | 13 June | |
| Gatekeeper | 22 June | 3 June | |
| Green-veined White | 30 March | 26 March | |
| Green Hairstreak | 20 April | 12 April | |
| Grizzled Skipper | 19 April | 9 April | |
| Holly Blue | 16 March | 25 March | |
| Large Skipper | 29 May | 29 April | |
| Large White | 29 March | 20 March | |
| Marbled White | 8 June | 31 May | |
| Meadow Brown | 30 May | 8 May | |
| Orange-tip | 8 April | 29 March | |
| Painted Lady | 10 April | 1 March | |
| Peacock | 29 January | 30 January | 14 February |
| Purple Emperor | 24 June | 19 June | |
| Purple Hairstreak | 16 June | 3 June | |
| Red Admiral | 19 January | 9 January | 16 January |
| Ringlet | 12 June | 3 June | |
| Silver-washed Fritillary | 17 June | 6 June | |
| Small Blue | 8 May | 2 May | |
| Small Copper | 22 April | 11 April | |
| Small Heath | 30 April | 25 April | |
| Small Skipper | 9 June | 31 May | |
| Small Tortoiseshell | 30 January | 4 March | 25 February |
| Small White | 18 March | 19 March | 25 February |
| Speckled Wood | 4 March | 28 February | |
| White Admiral | 18 June | 12 June | |
| White-letter Hairstreak | 12 June | 29 May |
⁰ - 2019-2024
ⁱ - 2018-2024