
| 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 | . | . | . | . | . | . | . | . | . | . | . | 11 | 10 | 23 | 27 | 18 | 5 | . | 1 | . | . | . | ||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 6 | 7 | . | . | . | . | . | . | . | . | . | . | . | ||||
| Dingy Skipper | . | . | . | 7 | 4 | 7 | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | 1 | 12 | 10 | 8 | 5 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||
| Brimstone | 3 | 2 | 1 | 3 | 9 | 3 | 6 | 2 | 4 | 1 | 4 | . | . | 3 | 10 | 8 | 9 | 20 | . | 5 | . | 1 | ||||
| Large White | . | . | . | . | . | . | 1 | . | . | 3 | . | . | . | 2 | 1 | 1 | 3 | 3 | 2 | . | . | . | ||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 7 | 3 | 7 | 1 | 1 | . | . | ||||
| Orange Tip | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | . | . | 1 | 5 | 2 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 1 | 1 | . | . | . | ||||
| Small Blue | . | . | . | . | 2 | . | 10 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brown Argus | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | 3 | . | . | . | . | ||||
| Common Blue | . | . | . | . | . | 3 | 16 | 7 | 8 | 12 | 7 | . | . | . | . | 4 | 12 | 25 | 7 | 18 | . | . | ||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 5 | 8 | 10 | 27 | 25 | 15 | 8 | . | . | ||||
| Adonis Blue | . | . | . | . | . | 1 | 2 | 8 | 2 | 1 | . | . | . | . | . | . | . | . | 2 | 2 | . | . | ||||
| Duke of Burgundy Fritillary | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 1 | ||||
| Peacock | 2 | 1 | 1 | . | 1 | . | 1 | 1 | . | . | . | . | 1 | . | 6 | 4 | . | . | . | . | . | . | ||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 5 | 15 | 17 | 7 | 11 | 5 | 3 | 1 | . | . | . | . | ||||
| Marsh Fritillary | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | 12 | 38 | 75 | 17 | 9 | . | . | . | . | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 13 | 10 | 15 | 21 | 10 | 9 | 4 | . | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | . | 14 | 42 | 19 | 22 | 35 | 88 | 121 | 164 | 241 | 210 | 185 | 24 | 19 | ||||
| Small Heath | . | . | . | . | . | 5 | 14 | 23 | 19 | 46 | 71 | 47 | 15 | 12 | 16 | 1 | 5 | 3 | 14 | 5 | 2 | 1 | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | 1 | 19 | 27 | 5 | 4 | 1 | . | . | . | . | . | . | . | ||||