
| 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/Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | |||||
| Small Skipper | . | . | . | . | . | . | . | . | . | . | . | 5 | 5 | 7 | 22 | 4 | 9 | 2 | . | . | . | |||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 1 | 5 | . | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 3 | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | . | . | 4 | 8 | 3 | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | . | . | . | 1 | 5 | 7 | 1 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 1 | 1 | . | 1 | 2 | 6 | 3 | 6 | 2 | 3 | . | . | . | . | . | 6 | 5 | 3 | 2 | 10 | . | |||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | |||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 3 | 7 | 8 | 2 | 1 | 1 | . | 1 | |||||
| Green-veined White | . | . | . | . | 1 | . | . | 1 | 4 | . | . | . | . | 3 | 2 | 8 | 3 | 2 | . | 3 | . | |||||
| Orange Tip | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | . | . | . | . | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | 2 | . | . | 3 | . | |||||
| Small Blue | . | . | . | . | 2 | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | |||||
| Common Blue | . | . | . | . | 1 | . | 2 | 3 | 15 | 9 | 2 | 3 | . | . | 1 | . | 3 | 2 | 7 | 14 | 1 | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 7 | 6 | 10 | 4 | 1 | |||||
| Duke of Burgundy Fritillary | . | . | . | . | 1 | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Small Tortoiseshell | 2 | . | . | . | . | 1 | . | . | . | . | 2 | 1 | . | 1 | 3 | 1 | 2 | . | 1 | 4 | 5 | |||||
| Peacock | . | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | |||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | 4 | 10 | . | 2 | . | . | . | |||||
| Speckled Wood | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 3 | 19 | 37 | 27 | 10 | 1 | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 62 | 83 | 28 | 4 | 1 | 1 | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 29 | 35 | 52 | 71 | 53 | 129 | 172 | 110 | 69 | 85 | 78 | 6 | |||||
| Small Heath | . | . | . | . | . | 5 | 13 | 37 | 44 | 115 | 37 | 76 | 78 | 57 | 43 | 32 | 10 | 7 | 7 | 1 | . | |||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 5 | 4 | 3 | 1 | . | . | . | . | . | |||||
| Unknown White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 18 | 14 | . | . | . | . | |||||