
| 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/Essex Skipper | . | . | . | . | . | . | . | . | . | 7 | 119 | 87 | 72 | 19 | 1 | 6 | . | . | . | . | . | . | ||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 12 | 14 | 31 | 30 | 9 | 4 | . | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | . | 11 | 15 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||
| Dingy Skipper | . | . | . | 2 | 1 | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | ||||
| Brimstone | 6 | 5 | 17 | 14 | 12 | 6 | 7 | 7 | 4 | 2 | 3 | 8 | 29 | 1 | . | 7 | 11 | 2 | 7 | 1 | . | 1 | ||||
| Large White | . | . | 1 | 1 | 1 | . | . | . | . | . | 10 | 11 | 1 | . | . | 2 | . | 2 | 1 | 1 | . | . | ||||
| Small White | . | . | . | 2 | . | 1 | 2 | 1 | . | 1 | 2 | 11 | 26 | 19 | 2 | 31 | 17 | 4 | 7 | 3 | 2 | . | ||||
| Green-veined White | . | . | . | . | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Orange Tip | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | . | . | 1 | 1 | . | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | 1 | 4 | 1 | 3 | 1 | . | . | . | 1 | 4 | 1 | 11 | 1 | 7 | 3 | 1 | 3 | 6 | 16 | 10 | ||||
| Brown Argus | . | . | . | . | . | . | . | 1 | . | . | . | . | 3 | . | . | 9 | 10 | 1 | 3 | . | . | . | ||||
| Common Blue | . | . | . | . | . | 25 | 30 | 12 | 1 | 5 | . | . | 6 | 14 | 91 | 87 | 119 | 52 | 22 | 13 | . | . | ||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 4 | 170 | 56 | 20 | 50 | 10 | 1 | . | . | . | . | ||||
| Adonis Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 1 | . | ||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | 5 | 5 | 1 | . | . | . | . | . | . | . | . | . | ||||
| Red Admiral | . | . | . | 1 | . | . | . | 1 | 3 | . | 11 | 3 | 15 | 1 | 3 | 1 | 1 | 1 | 1 | . | . | 1 | ||||
| Painted Lady | . | . | . | . | 2 | 1 | 1 | 4 | . | . | 1 | 2 | 8 | 2 | 2 | 3 | 2 | 1 | . | . | . | . | ||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | ||||
| Peacock | . | 2 | 5 | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | 1 | . | . | 1 | ||||
| Comma | . | 1 | . | . | . | . | . | . | . | . | 3 | 1 | 2 | 3 | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | 15 | 52 | 135 | 61 | 20 | 7 | 1 | . | . | . | . | . | . | . | ||||
| Speckled Wood | . | . | . | 3 | 2 | 2 | . | 2 | 1 | . | 2 | 2 | 4 | . | . | 2 | 1 | 1 | 4 | 2 | . | 2 | ||||
| Wall Brown | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | 3 | 2 | 1 | 4 | . | . | . | . | ||||
| Marbled White | . | . | . | . | . | . | . | . | 1 | 42 | 139 | 103 | 69 | 9 | 2 | . | . | . | . | . | . | . | ||||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 9 | 2 | 4 | 6 | 6 | 1 | 1 | 1 | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 32 | 29 | 148 | 76 | 24 | 18 | 9 | . | . | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | 5 | 23 | 62 | 165 | 95 | 155 | 118 | 68 | 128 | 179 | 97 | 100 | 59 | 36 | 8 | ||||
| Small Heath | . | . | . | . | . | 9 | 3 | 7 | 10 | 18 | 5 | 3 | 4 | 2 | 3 | . | 15 | 8 | 10 | 10 | 4 | . | ||||