Which butterflies emerged when?
These are the earliest dates on which each species of adult butterfly was reported to the website in 2026. Previous year for comparison.
| Species | 2025 | 2026 |
|---|---|---|
| Brimstone | 2025-01-14 | 2026-01-04 |
| Peacock | 2025-02-03 | 2026-01-16 |
| Red Admiral | 2025-01-02 | 2026-01-16 |
| Comma | 2025-03-09 | 2026-02-22 |
| Small Tortoiseshell | 2025-03-01 | 2026-02-24 |
| Large Tortoiseshell | 2025-03-19 | 2026-03-03 |
| Holly Blue | 2025-03-30 | 2026-03-18 |
| Small White | 2025-03-04 | 2026-03-18 |
| Speckled Wood | 2025-03-09 | 2026-03-18 |
| Orange Tip | 2025-03-30 | 2026-03-22 |
| Green-veined White | 2025-03-31 | 2026-03-31 |
| Large White | 2025-03-31 | 2026-04-02 |
| Wall Brown | 2025-04-10 | 2026-04-05 |
| Clouded Yellow | 2025-06-13 | 2026-04-06 |
| Painted Lady | 2025-02-25 | 2026-04-07 |
| Green Hairstreak | 2025-04-09 | 2026-04-08 |
| Grizzled Skipper | 2025-04-04 | 2026-04-08 |
| Small Copper | 2025-03-31 | 2026-04-12 |
| Dingy Skipper | 2025-04-09 | 2026-04-18 |
| Small Heath | 2025-04-09 | 2026-04-23 |
| Wood White | 2025-04-27 | 2026-04-23 |
| Small Blue | 2025-04-27 | 2026-04-25 |
| Common Blue | 2025-04-26 | 2026-04-27 |
| Adonis Blue | 2025-04-30 | 2026-04-29 |
| Brown Argus | 2025-04-27 | 2026-04-29 |
| Duke of Burgundy | 2025-05-01 | 2026-04-30 |
| Marsh Fritillary | 2025-04-27 | 2026-05-01 |
| Glanville Fritillary | 2025-04-26 | 2026-05-03 |
| Lulworth Skipper | 2025-05-02 | 2026-05-07 |
| Large Skipper | 2025-05-07 | 2026-05-08 |
| Meadow Brown | 2025-05-02 | 2026-05-22 |
| Silver-studded Blue | 2025-05-16 | 2026-05-24 |
| Marbled White | 2025-05-25 | 2026-05-29 |
| Small Skipper | 2025-05-20 | 2026-05-30 |
| White Admiral | 2025-06-03 | 2026-05-30 |
| Ringlet | 2025-06-07 | 2026-06-05 |
| Purple Hairstreak | 2025-06-14 | 2026-06-08 |
| Dark Green Fritillary | 2025-05-12 | 2026-06-13 |
| Gatekeeper | 2025-06-08 | 2026-06-13 |
| Silver-washed Fritillary | 2025-06-09 | 2026-06-13 |
| White-letter Hairstreak | 2025-06-13 | 2026-06-13 |
| Essex Skipper | 2025-06-17 | 2026-06-18 |
| Grayling | 2025-06-14 | 2026-06-27 |
| Purple Emperor | 2025-06-29 | 2026-07-01 |
| Brown Hairstreak | 2025-07-04 | 2026-07-04 |
| Long-tailed Blue | - | 2026-07-06 |
| Chalkhill Blue | 2025-07-04 | 2026-07-07 |
| American Painted Lady | 2025-09-22 | - |
| Silver-spotted Skipper | 2025-07-25 | - |
| Swallowtail | 2025-07-16 | - |
