
| APR | MAY | JUN | JUL | AUG | SEP | ||||||||||||||||||||||
| Week no. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | |
| Site | Ind | ||||||||||||||||||||||||||
| Small Skipper | NI | . | . | . | . | . | . | . | . | . | 8 | 9 | . | . | . | . | . | . | . | . | |||||||
| Essex Skipper | 2 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||||
| Large Skipper | 9 | . | . | . | . | . | 3 | 4 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | |||||||
| Dingy Skipper | NI | . | . | 40 | 9 | 9 | 2 | 9 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | 32 | 1 | . | 10 | 1 | 6 | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | 34 | . | . | . | . | . | . | . | . | 1 | . | 2 | 5 | 7 | 4 | 4 | 6 | 1 | 2 | 1 | |||||||
| Brimstone | 12 | 1 | . | . | . | 1 | . | 1 | . | . | . | 2 | . | . | 1 | 2 | . | . | 1 | . | |||||||
| Large White | 61 | . | 2 | 4 | 3 | 1 | . | . | . | . | . | 3 | 22 | 4 | 11 | 1 | . | 3 | . | . | |||||||
| Small White | 111 | . | 8 | 1 | . | . | . | . | . | . | 7 | 18 | 24 | 15 | 1 | 7 | 6 | 11 | . | 1 | |||||||
| Green-veined White | 8 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 2 | . | . | 5 | 1 | . | |||||||
| Orange Tip | 4 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | 4 | . | . | 1 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | 30 | . | . | 1 | . | . | . | . | . | . | . | . | 1 | 2 | . | 2 | . | 3 | 2 | 11 | |||||||
| Small Blue | 17 | . | . | 1 | 2 | 5 | 5 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brown Argus | 154 | . | . | . | 5 | 26 | 7 | 15 | 2 | . | . | 3 | 1 | 14 | 9 | 32 | 7 | 9 | 16 | 4 | |||||||
| Common Blue | 315 | . | . | . | 8 | 47 | 53 | . | 6 | 1 | . | 4 | 20 | 62 | 37 | 34 | 28 | 22 | 9 | . | |||||||
| Chalk-hill Blue | 52 | . | . | . | . | . | . | . | . | . | . | 3 | 6 | 9 | 9 | 13 | 6 | 2 | 3 | . | |||||||
| Adonis Blue | 69 | . | . | . | . | 14 | 1 | 3 | . | . | . | . | . | . | . | 4 | 7 | 11 | 17 | 9 | |||||||
| Holly Blue | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | |||||||
| Red Admiral | 53 | 1 | 10 | 1 | . | . | . | . | . | 2 | 5 | 6 | 9 | 2 | 2 | 3 | 2 | 1 | . | . | |||||||
| Painted Lady | 45 | . | . | 1 | 1 | . | 12 | 4 | . | 2 | . | 9 | 7 | 3 | 1 | . | . | 2 | 1 | . | |||||||
| Small Tortoiseshell | 25 | 5 | . | 1 | . | . | . | . | 1 | . | 4 | . | . | . | 1 | . | . | 1 | . | . | |||||||
| Peacock | 15 | 1 | . | 2 | . | . | . | . | . | . | . | 5 | . | . | . | . | . | . | 1 | . | |||||||
| Comma | 12 | . | 3 | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | . | 3 | 1 | . | . | |||||||
| Dark Green Fritillary | 3 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | |||||||
| Silver-washed Fritillary | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||||||
| Marsh Fritillary | 578 | . | . | 22 | 49 | 260 | 110 | 104 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Speckled Wood | 13 | . | . | . | 2 | 1 | . | . | . | . | 1 | 1 | . | . | 2 | 1 | 2 | 1 | . | . | |||||||
| Marbled White | 370 | . | . | . | . | . | . | . | 55 | 75 | 109 | 40 | . | 1 | . | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 94 | . | . | . | . | . | . | . | . | 1 | 19 | 26 | 16 | 4 | 2 | . | . | . | . | . | |||||||
| Meadow Brown | 2021 | . | . | . | . | . | 5 | 18 | 102 | 80 | 149 | 324 | 190 | 348 | 199 | 189 | 91 | 72 | 12 | 19 | |||||||
| Small Heath | 97 | . | 1 | 2 | 3 | 12 | 12 | 8 | 6 | . | 1 | 2 | . | 4 | 5 | 8 | 5 | 14 | 13 | 2 | |||||||
| Ringlet | 2 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||||