
| 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 | . | . | . | . | . | . | 6 | 12 | 25 | 22 | 7 | . | 1 | 1 | . | . | . | |||||||||
| Silver-spotted Skipper | 10 | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 1 | 3 | 1 | . | |||||||||
| Large Skipper | 100 | . | . | . | . | 1 | 1 | 2 | 11 | 26 | 38 | 7 | 12 | 2 | . | . | . | . | |||||||||
| Dingy Skipper | 4 | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | 2 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brimstone | 72 | 4 | 5 | 9 | 5 | . | 1 | . | . | . | . | 5 | 5 | 4 | 2 | 8 | 2 | . | |||||||||
| Large White | 157 | . | 4 | 7 | 15 | 7 | 5 | 1 | 1 | 5 | 7 | 14 | 38 | 14 | 12 | 8 | . | . | |||||||||
| Small White | 141 | . | 6 | 6 | 3 | 1 | 2 | . | 2 | 3 | 9 | 13 | 31 | 32 | 6 | 11 | 1 | . | |||||||||
| Green-veined White | 131 | . | 4 | 20 | 8 | 1 | . | . | 3 | 6 | 13 | 16 | 14 | 13 | 2 | 3 | . | . | |||||||||
| Orange Tip | 34 | . | 8 | 5 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Green Hairstreak | 13 | . | . | 2 | 3 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | 41 | . | . | . | . | . | . | . | . | . | 1 | 3 | 10 | 7 | 5 | 6 | 6 | . | |||||||||
| Brown Argus | 21 | . | . | . | 1 | . | . | . | . | 1 | . | . | 3 | 1 | 1 | 4 | 6 | . | |||||||||
| Common Blue | 144 | . | . | . | 2 | 4 | 4 | 2 | . | . | . | . | 8 | 20 | 9 | 32 | 41 | . | |||||||||
| Chalk-hill Blue | 28 | . | . | . | . | . | . | . | . | . | 7 | 6 | 5 | 2 | . | 2 | 4 | . | |||||||||
| Holly Blue | 3 | . | 1 | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | |||||||||
| Red Admiral | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | |||||||||
| Small Tortoiseshell | 72 | 9 | 2 | . | . | . | . | 1 | 7 | 4 | 5 | 3 | 1 | . | . | 1 | 5 | 16 | |||||||||
| Peacock | 28 | 4 | 1 | . | . | . | . | . | . | . | 1 | 1 | 4 | 6 | . | 4 | . | 1 | |||||||||
| Comma | 4 | 1 | . | 1 | . | . | . | . | 1 | . | . | 2 | . | . | . | . | . | . | |||||||||
| Speckled Wood | 100 | . | 1 | 2 | 1 | 5 | 10 | 6 | 6 | 3 | . | . | 5 | 8 | 12 | 10 | 9 | 8 | |||||||||
| Wall Brown | 6 | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | |||||||||
| Marbled White | 46 | . | . | . | . | . | . | 9 | 11 | 12 | 11 | 3 | . | . | . | . | . | . | |||||||||
| Gatekeeper / Hedge Brown | 119 | . | . | . | . | . | . | . | 9 | 21 | 16 | 26 | 34 | 10 | . | 2 | . | . | |||||||||
| Meadow Brown | 1618 | . | . | . | . | 2 | 31 | 137 | 204 | 245 | 219 | 240 | 180 | 158 | 81 | 53 | 42 | 3 | |||||||||
| Small Heath | 280 | . | . | 11 | 15 | 26 | 42 | 42 | 31 | 19 | 15 | 9 | 5 | 5 | 12 | 11 | 11 | 1 | |||||||||
| Ringlet | 16 | . | . | . | . | . | . | 1 | 5 | 5 | 2 | . | 3 | . | . | . | . | . | |||||||||