
| 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 Skipper | 69 | . | . | . | . | . | . | . | . | . | 4 | 2 | 4 | 14 | 16 | 7 | 3 | . | . | . | . | . | |||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Large Skipper | 23 | . | . | . | . | . | . | 13 | 7 | 5 | 5 | 2 | . | . | . | . | . | . | . | . | . | . | |||||
| Wood White | 20 | . | . | 1 | . | 5 | 9 | 6 | 1 | . | 1 | . | . | . | 1 | 1 | . | . | . | . | . | . | |||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Brimstone | 18 | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | 2 | 4 | . | . | . | 1 | . | . | |||||
| Large White | 9 | . | . | . | 1 | . | 1 | 1 | . | . | 2 | . | 1 | . | . | . | . | . | . | . | . | . | |||||
| Small White | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 3 | . | . | . | . | . | |||||
| Green-veined White | 170 | . | . | 4 | 9 | 6 | 2 | . | . | . | 1 | . | 1 | 5 | 56 | 14 | 13 | 11 | 5 | 4 | 1 | . | |||||
| Orange Tip | 5 | 1 | 3 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| White-letter Hairstreak | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Small Copper | 6 | . | . | . | . | 2 | 1 | 1 | 1 | . | . | . | . | 1 | 1 | . | 2 | 4 | 2 | 5 | . | . | |||||
| Brown Argus | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Common Blue | 15 | . | . | . | . | 4 | 5 | 17 | 2 | 2 | 1 | . | . | . | . | 1 | 4 | 5 | 2 | 1 | 1 | . | |||||
| Painted Lady | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | . | 4 | . | . | |||||
| Small Tortoiseshell | 16 | . | 1 | . | . | . | . | . | . | 2 | 3 | . | 2 | . | 1 | . | . | . | . | 3 | . | . | |||||
| Peacock | 39 | . | 1 | . | 1 | . | . | . | . | . | . | . | . | 1 | 18 | . | . | . | . | . | . | . | |||||
| Comma | 46 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 3 | 11 | |||||
| Small Pearl-bordered Fritillary | 19 | . | . | . | . | 9 | 9 | 9 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Silver-washed Fritillary | 89 | . | . | . | . | . | . | . | . | . | 2 | . | 4 | 4 | 20 | 16 | 22 | 9 | 2 | 3 | . | . | |||||
| Speckled Wood | 116 | . | . | . | 1 | 1 | 3 | 14 | 14 | 5 | 3 | 1 | . | . | 5 | 12 | 6 | 14 | 7 | 29 | 29 | 15 | |||||
| Marbled White | 151 | . | . | . | . | . | . | . | . | . | 19 | 8 | 19 | 7 | 25 | 4 | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 564 | . | . | . | . | . | . | . | . | . | . | 2 | 12 | 28 | 172 | 84 | 96 | 57 | 28 | 9 | . | . | |||||
| Meadow Brown | 428 | . | . | . | . | . | . | 10 | 12 | 23 | 71 | 16 | 19 | 19 | 31 | 14 | 16 | 4 | 5 | . | . | . | |||||
| Ringlet | 820 | . | . | . | . | . | . | . | 3 | 18 | 159 | 33 | 44 | 39 | 28 | 11 | 2 | 1 | . | . | . | . | |||||