
| 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 | . | . | . | . | . | . | . | . | 2 | 19 | 26 | 14 | 13 | 3 | 1 | . | . | . | . | . | . | |||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 6 | 15 | 36 | 8 | 1 | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | 1 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | 3 | 3 | . | . | 3 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | . | 1 | 5 | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | . | . | 6 | 3 | 3 | 1 | 3 | 3 | 1 | . | 5 | 1 | 4 | . | . | 8 | 9 | 9 | . | 2 | . | |||||
| Large White | . | 1 | 1 | 1 | . | . | . | . | . | . | 1 | 1 | 1 | 1 | . | 3 | 1 | 1 | . | . | 1 | |||||
| Small White | . | 1 | 2 | 1 | . | . | . | . | 1 | 2 | 2 | 3 | 5 | 4 | 3 | 10 | 6 | 7 | 2 | . | 1 | |||||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Orange Tip | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | . | . | . | . | 4 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | . | 1 | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | 1 | . | . | |||||
| Small Blue | . | . | . | . | . | 1 | 6 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 1 | . | . | . | |||||
| Common Blue | . | . | 4 | 2 | . | . | 3 | 1 | . | . | . | . | 3 | 8 | 3 | 12 | 15 | 6 | 1 | 1 | . | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | 4 | 75 | 134 | 306 | 373 | 64 | 76 | 80 | 32 | 1 | . | . | |||||
| Duke of Burgundy Fritillary | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | |||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Peacock | 4 | . | . | . | 1 | . | . | . | . | . | . | . | 3 | 1 | . | . | 1 | . | 1 | 2 | . | |||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | |||||
| Dark Green Fritillary | . | . | . | . | . | 1 | . | . | 4 | 15 | 16 | 9 | 4 | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | 1 | . | 1 | 1 | 1 | 1 | 2 | 3 | . | 1 | . | . | . | 1 | 3 | 4 | 6 | 6 | 9 | 3 | 1 | |||||
| Marbled White | . | . | . | . | . | . | . | 7 | 28 | 61 | 47 | 7 | 4 | . | . | . | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 2 | 26 | 21 | 23 | 3 | 10 | 4 | 1 | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | 4 | 4 | 7 | 17 | 33 | 105 | 170 | 90 | 118 | 96 | 67 | 29 | 25 | 5 | |||||
| Small Heath | . | . | 7 | 9 | . | 6 | 14 | 10 | 30 | 42 | 17 | 5 | 2 | 1 | 1 | 6 | 10 | 9 | 13 | 3 | 2 | |||||
| Ringlet | . | . | . | . | . | . | . | 3 | 19 | 26 | 20 | 2 | 1 | . | . | . | . | . | . | . | . | |||||