
| 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 | 153 | . | . | . | . | . | . | . | 10 | 63 | 56 | 13 | 4 | . | . | . | . | . | . | ||||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Large Skipper | 50 | . | . | . | . | 2 | 16 | 10 | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Large White | 32 | . | . | . | . | . | 1 | . | . | 1 | 2 | 10 | 4 | 3 | 1 | . | 1 | 1 | 2 | ||||||||
| Small White | 42 | . | . | . | . | 1 | . | . | 2 | 4 | 4 | 8 | 7 | 3 | 2 | 2 | 2 | . | . | ||||||||
| Green-veined White | 7 | . | . | . | . | . | 1 | . | . | 2 | . | . | . | 1 | . | . | . | . | . | ||||||||
| Orange Tip | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | 6 | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Blue | 2 | . | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||||||
| Brown Argus | 79 | . | . | . | 3 | 5 | . | 1 | . | 3 | 7 | 3 | 15 | 5 | 10 | 5 | 4 | . | . | ||||||||
| Common Blue | 97 | . | . | . | . | 5 | 1 | 1 | . | 1 | 7 | 9 | 12 | 12 | 19 | 9 | 5 | . | . | ||||||||
| Chalk-hill Blue | 21 | . | . | . | . | . | . | . | . | 3 | 6 | 7 | 3 | 2 | . | . | . | . | . | ||||||||
| Adonis Blue | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| Holly Blue | 2 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||||
| Red Admiral | 2 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | ||||||||
| Small Tortoiseshell | 33 | 1 | . | 3 | . | . | . | 1 | 1 | 2 | 1 | 2 | . | . | . | . | 2 | . | 3 | ||||||||
| Peacock | 7 | 1 | . | . | . | . | . | . | . | 2 | 1 | . | 3 | . | . | . | . | . | . | ||||||||
| Comma | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||||
| Dark Green Fritillary | 7 | . | . | . | . | . | . | . | 3 | 2 | 1 | . | . | . | . | . | . | . | . | ||||||||
| Marsh Fritillary | NI | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | 61 | . | . | . | . | 7 | 2 | 1 | . | . | 1 | 5 | 8 | 2 | 5 | 3 | 3 | . | . | ||||||||
| Wall Brown | 22 | . | . | 1 | . | 4 | . | . | . | . | . | 4 | 3 | 4 | 1 | . | . | . | 2 | ||||||||
| Marbled White | 37 | . | . | . | . | . | . | 2 | 9 | 13 | 6 | . | . | . | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | 5 | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 1 | . | . | . | . | ||||||||
| Meadow Brown | 249 | . | . | . | . | . | 9 | 28 | 46 | 44 | 39 | 19 | 10 | 11 | 1 | 2 | . | . | . | ||||||||
| Small Heath | 331 | . | . | . | 2 | 14 | 14 | 21 | 9 | 8 | 10 | 10 | 38 | 49 | 31 | 28 | 20 | . | . | ||||||||
| Ringlet | 53 | . | . | . | . | . | . | 7 | 12 | 13 | 5 | . | . | . | . | . | . | . | . | ||||||||
| Burnet Companion | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||