
| 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 | ||||||||||||||||||||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | 15 | 118 | 75 | 58 | 16 | 5 | . | . | . | . | . | |||||||
| Large Skipper | . | . | . | 2 | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | |||||||
| Large White | . | 1 | . | 1 | . | 2 | . | . | . | . | 1 | 3 | 1 | 1 | . | 5 | . | . | . | |||||||
| Small White | . | . | . | . | . | . | . | . | 4 | 1 | 4 | 2 | 1 | 2 | 5 | 11 | 4 | 8 | . | |||||||
| Green-veined White | 1 | 25 | 51 | 46 | 5 | 5 | 3 | 4 | 4 | 60 | 95 | 169 | 65 | 56 | 24 | 75 | 44 | 12 | 2 | |||||||
| Orange Tip | . | 6 | 10 | 7 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 1 | . | . | . | |||||||
| Common Blue | . | . | . | . | . | 1 | . | 4 | 2 | 5 | . | . | 1 | 17 | 16 | 17 | 1 | . | . | |||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 3 | . | . | . | . | . | |||||||
| Small Tortoiseshell | 1 | 2 | 6 | 13 | 2 | . | 1 | . | . | 6 | 9 | 11 | 1 | 3 | 4 | 5 | 9 | . | . | |||||||
| Peacock | . | 2 | 1 | 1 | 2 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||
| Comma | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 1 | . | . | . | . | . | |||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 8 | 80 | 65 | 51 | 1 | . | . | . | . | |||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 3 | 37 | 6 | 7 | 4 | 14 | 1 | . | . | . | . | |||||||
| Small Heath | . | . | . | . | . | . | . | . | 5 | 8 | 2 | . | . | . | . | 1 | 1 | 10 | 1 | |||||||