
| 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 | . | . | . | . | . | . | . | . | . | 1 | 8 | 26 | 29 | 45 | 7 | . | . | . | . | . | . | . | ||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | ||||
| Large Skipper | . | . | . | . | . | 6 | 6 | 29 | 69 | 52 | 42 | 46 | 53 | 17 | 3 | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Wood White | . | . | . | 3 | 3 | 6 | 6 | 1 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 5 | 1 | 6 | 4 | . | . | . | . | . | . | . | . | 2 | 4 | 3 | 1 | . | . | . | 3 | . | . | ||||
| Large White | . | . | . | 5 | 4 | 8 | 3 | 5 | 5 | 1 | 3 | 8 | 17 | 11 | 12 | 6 | 13 | 3 | 14 | 6 | 2 | 1 | ||||
| Small White | . | . | 2 | . | . | . | 1 | 2 | . | . | 4 | 6 | 11 | 31 | 18 | 14 | 41 | 41 | 39 | 25 | 13 | 1 | ||||
| Green-veined White | . | . | 18 | 11 | 11 | 4 | 2 | 2 | 3 | 1 | . | 7 | 23 | 3 | 8 | 12 | 8 | 19 | 20 | 8 | 4 | 1 | ||||
| Orange Tip | . | 5 | 5 | 4 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brown Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | ||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Common Blue | . | . | . | 1 | 6 | 9 | 9 | 2 | 1 | . | . | . | . | . | 10 | 25 | 29 | 6 | . | 2 | . | 1 | ||||
| Holly Blue | . | . | 3 | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||
| White Admiral | . | . | . | . | . | . | . | . | . | 1 | 4 | 13 | 11 | 2 | . | . | . | . | . | . | . | . | ||||
| Red Admiral | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | 1 | 1 | 1 | 6 | 1 | . | . | ||||
| Small Tortoiseshell | 1 | . | . | . | . | . | . | . | . | 1 | 2 | . | . | 2 | 1 | 12 | 24 | 50 | 22 | 11 | 2 | 1 | ||||
| Peacock | 18 | 7 | 5 | 2 | 4 | 1 | 1 | . | . | . | . | 1 | 18 | 21 | 21 | 3 | 3 | . | . | . | . | 2 | ||||
| Comma | 8 | 1 | . | . | . | . | . | 2 | 1 | 1 | 2 | 3 | . | 1 | . | . | 1 | 2 | 23 | 76 | 13 | . | ||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | . | 5 | 22 | 12 | 9 | 7 | 12 | 42 | 18 | 8 | 2 | . | 2 | 4 | 9 | 21 | 36 | 34 | 39 | 7 | 2 | 5 | ||||
| Marbled White | . | . | . | . | . | . | . | . | 5 | 4 | 41 | 40 | 14 | 12 | . | . | . | . | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 3 | 19 | 46 | 34 | 9 | 2 | . | . | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | 3 | 3 | 8 | 21 | 14 | 32 | 9 | 2 | 17 | 2 | 1 | . | . | . | ||||
| Ringlet | . | . | . | . | . | . | . | . | 1 | 13 | 237 | 306 | 136 | 46 | 6 | . | . | . | . | . | . | . | ||||