
| 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/Essex Skipper | 25 | . | . | . | . | . | . | . | 3 | 9 | 9 | 2 | 1 | . | . | 2 | . | . | . | ||||||||
| Silver-spotted Skipper | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 7 | . | . | . | ||||||||
| Large Skipper | 106 | . | . | . | . | 8 | 8 | 5 | 18 | 22 | 32 | 9 | . | . | 5 | . | . | . | . | ||||||||
| Dingy Skipper | 135 | . | 4 | 27 | 27 | 35 | 15 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | NI | 1 | 16 | 8 | 15 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Clouded Yellow | 3 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | ||||||||
| Brimstone | NI | 12 | 10 | 7 | 9 | 5 | . | 1 | 1 | 2 | 2 | 6 | . | 2 | 4 | 2 | . | 1 | 4 | ||||||||
| Large White | 43 | . | . | . | . | 1 | 1 | . | 1 | . | 5 | 12 | 8 | 10 | 1 | 2 | 1 | . | . | ||||||||
| Small White | 41 | . | . | . | . | . | . | . | 4 | 3 | 4 | 5 | 5 | 6 | 4 | 6 | 4 | . | . | ||||||||
| Green-veined White | NI | 4 | 1 | 1 | 2 | . | . | . | . | . | . | . | 1 | 1 | 1 | 2 | . | . | . | ||||||||
| Orange Tip | NI | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | 44 | . | 2 | 10 | 11 | 6 | 3 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brown Hairstreak | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | ||||||||
| Small Copper | 12 | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 1 | . | 4 | . | . | 1 | ||||||||
| Small Blue | 9 | . | . | . | . | . | . | . | 2 | . | . | . | . | 1 | 6 | . | . | . | . | ||||||||
| Brown Argus | 161 | . | . | 20 | 19 | 7 | 1 | . | . | . | . | 7 | 14 | 10 | 17 | 29 | 14 | 4 | . | ||||||||
| Common Blue | 711 | . | . | 1 | 26 | 79 | 109 | 42 | 33 | 3 | 1 | 3 | 13 | 30 | 87 | 133 | 62 | 37 | 6 | ||||||||
| Chalk-hill Blue | 4 | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | . | . | . | . | . | ||||||||
| Holly Blue | 6 | . | 1 | . | . | 1 | . | . | 3 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | 5 | . | . | . | . | . | . | 1 | . | 2 | . | 2 | . | . | . | . | . | . | . | ||||||||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| Small Tortoiseshell | 3 | . | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||||||
| Peacock | NI | 1 | 1 | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | ||||||||
| Dark Green Fritillary | 868 | . | . | . | . | . | 17 | 213 | 320 | 182 | 133 | 14 | 3 | 1 | . | . | . | . | . | ||||||||
| Silver-washed Fritillary | 9 | . | . | . | . | . | . | . | . | . | 4 | 4 | . | 1 | . | . | . | . | . | ||||||||
| Marsh Fritillary | 18 | . | . | 1 | 2 | 10 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | 191 | 4 | 9 | 4 | 7 | 13 | 19 | 8 | 5 | 6 | 3 | 7 | 8 | 7 | 8 | 33 | 18 | 5 | . | ||||||||
| Marbled White | 530 | . | . | . | . | . | 2 | 104 | 192 | 147 | 76 | 15 | 1 | . | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | 78 | . | . | . | . | . | . | . | . | 14 | 26 | 13 | 18 | 9 | . | . | . | . | . | ||||||||
| Meadow Brown | 1877 | . | . | . | . | . | 8 | 26 | 39 | 36 | 67 | 133 | 199 | 159 | 264 | 304 | 183 | 174 | 90 | ||||||||
| Small Heath | 408 | . | . | 5 | 17 | 26 | 38 | 39 | 67 | 47 | 39 | 12 | 11 | 9 | 30 | 46 | 3 | 4 | 2 | ||||||||
| Ringlet | 68 | . | . | . | . | . | . | 22 | 28 | 14 | 3 | . | . | . | . | 1 | . | . | . | ||||||||