
| 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 | . | . | . | . | . | . | . | 57 | 61 | 42 | 5 | 4 | . | . | . | . | . | . | ||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | ||||||||
| Large Skipper | . | . | . | . | . | 12 | 16 | 47 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Dingy Skipper | . | 2 | 22 | 58 | 17 | 39 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | 6 | 8 | 2 | . | . | . | . | . | ||||||||
| Brimstone | 3 | 2 | 5 | 2 | . | . | . | . | . | 8 | 4 | 5 | 3 | . | . | 2 | 1 | 3 | ||||||||
| Large White | 1 | 3 | 10 | 14 | 11 | 1 | 2 | 1 | 2 | 1 | 5 | 10 | 4 | 1 | . | 1 | 3 | 3 | ||||||||
| Small White | . | 1 | 6 | 2 | 5 | 4 | . | . | 2 | 8 | 7 | 23 | 6 | 2 | 5 | . | . | . | ||||||||
| Green-veined White | . | . | . | 5 | 4 | 2 | 1 | 1 | 2 | 17 | 7 | 1 | 4 | 4 | 2 | 4 | . | . | ||||||||
| Orange Tip | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | . | 3 | 4 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | . | . | . | 5 | 7 | 2 | . | . | . | 1 | 2 | 6 | 3 | 9 | 1 | 4 | 4 | 3 | ||||||||
| Small Blue | . | . | . | 14 | 4 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brown Argus | . | . | . | 20 | 17 | 4 | 6 | . | . | . | . | 4 | . | . | . | . | . | . | ||||||||
| Common Blue | . | . | . | . | 21 | 60 | 31 | 49 | . | . | 48 | 111 | 84 | 6 | 8 | 1 | . | . | ||||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | 3 | 53 | 87 | 99 | 63 | 24 | 6 | 1 | . | . | . | ||||||||
| Duke of Burgundy Fritillary | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | . | . | . | 1 | . | . | . | 1 | . | . | 2 | . | . | 1 | . | 1 | 2 | 6 | ||||||||
| Painted Lady | . | . | 1 | . | 5 | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | ||||||||
| Small Tortoiseshell | 2 | . | . | . | 1 | . | . | 1 | 1 | 8 | 4 | 2 | 2 | 20 | 14 | 18 | 9 | 8 | ||||||||
| Peacock | 2 | 1 | 2 | 1 | . | . | . | . | 3 | 15 | 8 | 2 | 7 | 1 | . | . | . | . | ||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | ||||||||
| Marsh Fritillary | . | . | . | 44 | 55 | 33 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | . | . | 2 | 2 | . | . | . | . | . | . | 5 | 7 | 13 | 5 | 3 | 2 | . | . | ||||||||
| Wall Brown | . | . | . | 37 | 29 | 7 | . | . | . | . | 10 | 30 | 12 | 2 | . | . | . | . | ||||||||
| Marbled White | . | . | . | . | . | . | . | 113 | 107 | 62 | 5 | . | . | . | . | . | . | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | 9 | 21 | 21 | 11 | 2 | 2 | . | . | . | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | 10 | 25 | 219 | 219 | 191 | 167 | 134 | 94 | 28 | 5 | . | . | . | ||||||||
| Small Heath | . | . | . | 113 | 31 | 57 | 38 | 23 | 14 | 13 | 16 | 18 | 6 | . | 3 | 2 | . | . | ||||||||
| Ringlet | . | . | . | . | . | . | . | 14 | 22 | 13 | 4 | 2 | . | . | . | . | . | . | ||||||||