
| 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 | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | ||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 12 | . | 114 | . | . | . | . | . | . | . | ||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 40 | 104 | 40 | 6 | 4 | . | ||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 4 | . | . | 4 | . | . | . | . | . | . | . | . | . | ||||
| Dingy Skipper | . | . | . | . | 6 | 4 | 12 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 6 | 6 | 6 | ||||
| Brimstone | 4 | 10 | 6 | 8 | 12 | 14 | 2 | 6 | 4 | . | . | . | . | . | . | 4 | . | . | . | . | . | . | ||||
| Large White | . | . | . | . | 2 | 2 | . | . | 2 | 2 | . | . | . | . | 10 | 6 | 8 | 38 | . | 6 | 4 | . | ||||
| Small White | . | . | . | . | 2 | . | 2 | 2 | . | . | . | . | . | . | . | 12 | . | 8 | . | . | . | . | ||||
| Green-veined White | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | 4 | 2 | . | . | . | . | ||||
| Green Hairstreak | . | . | . | . | 2 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | ||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 34 | 8 | 4 | . | . | ||||
| Common Blue | . | . | . | . | . | 6 | 10 | 8 | 4 | 6 | . | . | . | . | . | . | 26 | 40 | 108 | 64 | 26 | 8 | ||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 30 | 20 | 84 | 8 | 38 | . | . | ||||
| Adonis Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | ||||
| Small Tortoiseshell | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Peacock | 6 | 6 | . | 4 | 4 | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | ||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | ||||
| Speckled Wood | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 136 | 28 | 28 | 128 | 12 | . | . | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 18 | 36 | 14 | 156 | 158 | 80 | 128 | 28 | 12 | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | . | 4 | 16 | 42 | 212 | 142 | 76 | 324 | 166 | 166 | 262 | 92 | 112 | 18 | 8 | ||||
| Small Heath | . | . | . | . | . | 4 | 2 | 4 | 8 | 34 | 18 | 98 | 12 | 4 | 104 | 8 | . | . | . | 4 | 2 | . | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 6 | 128 | 18 | 16 | 4 | 6 | . | . | . | . | . | . | ||||