Hertfordshire & Middlesex Branch
Saving butterflies, moths and our environment
Last updated 30 April 2026
Note that first and last sightings dates are those which have been submitted for records sent to the website via the news submission form and previously by email. Records submitted elsewhere like iRecord are not represented here.
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 | 24 April |
| Brown Hairstreak | 19 July ⁱ | 1 July | |
| Camberwell Beauty | |||
| Chalk Hill Blue | 29 June | 25 June | |
| Clouded Yellow | 10 June | 10 May | 18 April |
| Comma | 6 February | 8 February | 4 February |
| Common Blue | 3 May | 23 April | 30 April |
| Dark Green Fritillary | 21 June | 1 June | |
| Dingy Skipper | 3 May | 25 April | 25 April |
| Essex Skipper | 19 June | 13 June | |
| Gatekeeper | 22 June | 3 June | |
| Green-veined White | 30 March | 26 March | 2 April |
| Green Hairstreak | 20 April | 12 April | 21 April |
| Grizzled Skipper | 19 April | 9 April | 18 April |
| Holly Blue | 16 March | 25 March | 21 March |
| Large Skipper | 29 May | 29 April | |
| Large White | 29 March | 20 March | 7 April |
| Marbled White | 8 June | 31 May | |
| Meadow Brown | 30 May | 8 May | |
| Orange-tip | 8 April | 29 March | 19 March |
| Painted Lady | 10 April | 1 March | 14 April |
| 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 | 30 April |
| Small Copper | 22 April | 11 April | 19 April |
| Small Heath | 30 April | 25 April | 29 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 | 18 March |
| White Admiral | 18 June | 12 June | |
| White-letter Hairstreak | 12 June | 29 May |
⁰ - 2019-2024
ⁱ - 2018-2024