
| 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 | 315 | . | . | . | . | . | . | . | . | 52 | 54 | 85 | 49 | 12 | 6 | . | . | . | |||||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | 1 | 1 | . | . | |||||||||
| Silver-spotted Skipper | 5 | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 1 | . | . | . | |||||||||
| Large Skipper | 8 | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . | |||||||||
| Dingy Skipper | 82 | . | . | . | 1 | 17 | 6 | 1 | 4 | . | . | . | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | 25 | . | . | . | 1 | . | 5 | 5 | 3 | . | . | . | . | . | . | . | . | . | |||||||||
| Clouded Yellow | 7 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 4 | 1 | |||||||||
| Brimstone | 98 | 5 | 5 | 6 | 17 | 4 | 3 | 6 | 1 | . | . | 4 | 4 | 2 | 2 | 3 | 1 | 4 | |||||||||
| Large White | 29 | . | . | . | . | 6 | . | . | . | . | 4 | 3 | 3 | 2 | 1 | 1 | . | . | |||||||||
| Small White | 109 | 1 | . | . | . | 12 | . | . | . | 7 | 17 | 6 | 10 | 6 | 5 | 6 | 4 | 5 | |||||||||
| Green-veined White | 21 | . | . | 1 | 5 | . | . | . | . | 1 | . | 1 | . | . | . | . | 1 | . | |||||||||
| Orange Tip | 14 | . | . | . | 1 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Green Hairstreak | 27 | . | . | . | 1 | 13 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Blue | 76 | . | . | . | . | . | 26 | 15 | 2 | . | . | . | . | . | . | . | . | . | |||||||||
| Brown Argus | 12 | . | . | . | . | . | . | 1 | . | . | . | . | 2 | 1 | 1 | 3 | 4 | . | |||||||||
| Common Blue | 253 | . | . | . | . | . | 29 | 17 | 7 | . | . | 8 | 19 | 20 | 31 | 28 | 26 | 12 | |||||||||
| Chalk-hill Blue | 187 | . | . | . | . | . | . | . | . | . | 11 | 27 | 44 | 29 | 45 | 13 | 12 | 4 | |||||||||
| Adonis Blue | 24 | . | . | . | . | . | 2 | 2 | . | . | . | . | . | 1 | 1 | 9 | 1 | . | |||||||||
| Duke of Burgundy Fritillary | 25 | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Red Admiral | 18 | . | . | . | . | . | 2 | 2 | . | 1 | 1 | . | 1 | . | 1 | 1 | 1 | 3 | |||||||||
| Painted Lady | 3 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | |||||||||
| Small Tortoiseshell | 8 | . | . | . | . | . | . | . | . | 4 | 2 | . | . | . | . | . | . | . | |||||||||
| Peacock | 41 | 1 | 1 | 4 | 8 | 2 | . | . | . | . | 1 | 5 | 3 | 1 | . | 1 | . | . | |||||||||
| Comma | 7 | . | . | 1 | . | . | . | . | . | 2 | 1 | 1 | . | . | . | . | . | . | |||||||||
| Dark Green Fritillary | 22 | . | . | . | . | . | . | . | . | 5 | 4 | 5 | 3 | . | 1 | . | . | . | |||||||||
| Speckled Wood | 27 | . | . | . | 1 | . | 2 | 1 | . | . | . | . | . | 1 | 1 | 3 | 9 | 4 | |||||||||
| Marbled White | 595 | . | . | . | . | . | . | 1 | 35 | 182 | 101 | 53 | 5 | 1 | . | . | . | . | |||||||||
| Gatekeeper / Hedge Brown | 567 | . | . | . | . | . | . | . | . | 60 | 97 | 172 | 117 | 43 | 15 | 2 | 1 | . | |||||||||
| Meadow Brown | 608 | . | . | . | . | . | . | 5 | 25 | 106 | 66 | 93 | 59 | 47 | 40 | 17 | 6 | 7 | |||||||||
| Small Heath | 230 | . | . | . | . | 6 | 33 | 33 | 19 | 8 | 5 | 5 | 3 | 4 | 7 | 10 | 6 | 3 | |||||||||
| Ringlet | 278 | . | . | . | . | . | . | . | 13 | 105 | 24 | 13 | 4 | . | . | . | . | . | |||||||||