
| 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 | NI | . | . | . | . | . | . | . | . | . | . | 1 | 12 | 12 | 2 | 1 | 1 | . | . | . | . | . | |||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | |||||
| Silver-spotted Skipper | 134 | . | . | . | . | . | . | . | . | . | . | . | 1 | 30 | 60 | 33 | 4 | 1 | 4 | 1 | . | . | |||||
| Large Skipper | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | 29 | . | . | 9 | 8 | 5 | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | NI | 1 | 10 | 3 | 4 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | NI | . | 4 | 6 | 1 | . | . | . | 1 | . | 2 | . | . | 3 | . | 1 | 4 | . | . | . | . | . | |||||
| Large White | 8 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | 1 | 1 | . | . | . | 1 | . | |||||
| Small White | NI | 1 | . | . | 1 | . | . | . | . | . | . | . | 3 | . | . | 2 | 4 | . | . | . | . | . | |||||
| Orange Tip | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | 13 | . | . | 3 | 2 | 3 | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | NI | . | 1 | 1 | 2 | 5 | . | . | 1 | . | . | . | 7 | 3 | 1 | 2 | . | 1 | 1 | . | 4 | 1 | |||||
| Small Blue | 7 | . | . | . | . | . | . | . | 3 | 3 | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Brown Argus | 104 | . | . | 2 | 8 | 23 | . | 7 | 8 | 1 | 1 | . | 1 | 2 | 11 | 4 | 7 | 6 | 3 | 4 | 1 | . | |||||
| Common Blue | 284 | . | . | . | 4 | 35 | . | 42 | 31 | 24 | 12 | 1 | . | 6 | 7 | 22 | 28 | 11 | 10 | 12 | . | . | |||||
| Chalk-hill Blue | 25 | . | . | . | . | . | . | . | . | . | . | . | 1 | 8 | 8 | 4 | 4 | . | . | . | . | . | |||||
| Red Admiral | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | . | |||||
| Small Tortoiseshell | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | |||||
| Peacock | NI | 1 | 3 | 2 | 1 | 1 | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | . | . | . | |||||
| Comma | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||||
| Pearl-bordered Fritillary | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Dark Green Fritillary | 276 | . | . | . | . | . | . | 1 | 17 | 81 | 65 | 60 | 11 | 6 | . | 1 | . | . | . | . | . | . | |||||
| Speckled Wood | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Marbled White | 193 | . | . | . | . | . | . | . | 16 | 46 | 50 | 48 | 6 | 3 | . | . | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 2 | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | |||||
| Meadow Brown | 1252 | . | . | . | . | . | . | . | . | . | 8 | 1 | 83 | 235 | 336 | 317 | 123 | 71 | 35 | 38 | 1 | 1 | |||||
| Small Heath | 292 | . | . | . | 2 | 2 | . | 5 | 13 | 19 | 35 | 65 | 27 | 24 | 9 | 4 | 1 | 2 | 7 | 10 | 4 | . | |||||
| Ringlet | 5 | . | . | . | . | . | . | . | . | 1 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | |||||