
| 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 | ||||||||||||||||||||||||||
| Small Skipper | . | . | . | . | . | . | . | . | . | 34 | 71 | 81 | 55 | 61 | 13 | 2 | 2 | . | . | . | . | |||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | 3 | 22 | 8 | 33 | 1 | . | 1 | . | . | . | . | . | |||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | . | 10 | 3 | 4 | . | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | . | 10 | 5 | 10 | 7 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | . | . | . | 2 | 1 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 1 | 2 | . | 4 | 3 | . | 1 | 2 | . | . | . | . | . | 12 | 18 | . | 3 | . | 4 | 21 | 9 | |||||
| Large White | . | . | . | . | . | 2 | . | . | . | . | . | . | . | 13 | 13 | 1 | 4 | 1 | 2 | 1 | . | |||||
| Small White | . | . | . | . | . | 1 | 6 | . | . | 1 | . | . | 1 | 6 | 7 | . | 1 | 4 | 10 | 15 | 6 | |||||
| Green-veined White | . | . | . | 1 | 1 | 7 | 2 | . | . | . | . | . | 1 | 8 | 10 | 2 | . | 1 | . | 1 | . | |||||
| Orange Tip | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | . | . | . | . | . | 2 | . | 1 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | |||||
| Brown Argus | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | |||||
| Common Blue | . | . | . | . | . | 3 | 9 | 16 | 9 | 1 | 1 | . | . | . | 4 | 9 | 13 | 10 | 3 | 8 | 3 | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | 1 | 2 | 2 | 3 | |||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | 2 | . | |||||
| Small Tortoiseshell | 1 | 1 | 1 | . | . | . | . | . | 2 | 2 | 7 | 2 | 5 | 3 | 2 | 1 | 20 | 12 | 24 | 33 | 16 | |||||
| Peacock | 1 | 1 | 6 | 2 | . | . | 1 | . | . | . | . | . | . | 3 | 11 | 2 | 3 | 2 | 4 | . | . | |||||
| Comma | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | 1 | . | . | . | . | . | . | . | |||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 4 | 1 | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | . | . | . | . | . | . | 4 | 2 | 6 | 1 | 4 | . | . | . | 2 | 9 | 3 | 2 | 3 | 4 | 5 | |||||
| Wall Brown | . | . | . | . | 2 | 2 | 1 | 1 | . | . | . | . | . | . | 1 | 4 | 5 | 3 | . | 2 | . | |||||
| Marbled White | . | . | . | . | . | . | . | . | . | 11 | 48 | 88 | 59 | 19 | 8 | . | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 1 | 13 | 22 | 22 | 33 | 15 | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | . | 19 | 120 | 141 | 132 | 169 | 158 | 153 | 105 | 90 | 44 | 74 | 59 | 10 | |||||
| Small Heath | . | . | . | . | 2 | 5 | 26 | 11 | 27 | 39 | 43 | 12 | 14 | 5 | 8 | 3 | 5 | 1 | 4 | 1 | . | |||||
| Ringlet | . | . | . | . | . | . | . | . | . | 11 | 14 | 18 | 32 | 2 | . | . | . | . | . | . | . | |||||