
| 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 | . | . | . | . | . | . | . | . | . | . | 8 | 22 | 36 | 32 | 12 | 2 | 2 | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | . | . | 2 | 8 | . | . | . | . | . | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | . | 2 | . | 6 | 4 | . | 8 | 8 | 4 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | . | . | . | . | 2 | 4 | 2 | 2 | . | . | . | . | 2 | 8 | 2 | 4 | 8 | . | 2 | 6 | ||||||
| Large White | . | . | . | . | . | . | . | . | 2 | . | . | 4 | 8 | 4 | 2 | . | 4 | . | . | . | ||||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 18 | . | 8 | 6 | 4 | . | ||||||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | ||||||
| Green Hairstreak | . | . | 6 | 14 | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | ||||||
| Small Blue | . | . | . | . | . | 2 | 18 | 10 | 4 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brown Argus | . | . | . | . | . | . | . | 4 | . | . | . | . | . | 2 | . | . | . | 4 | 8 | . | ||||||
| Common Blue | . | . | . | . | . | 2 | . | 26 | 2 | 6 | . | . | . | . | 2 | . | 8 | 32 | 28 | 6 | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 24 | 72 | 164 | 104 | 274 | 242 | 102 | 72 | 6 | ||||||
| Adonis Blue | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | . | 6 | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | ||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | 4 | 2 | 6 | 4 | . | . | . | . | 2 | 16 | ||||||
| Peacock | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 18 | 8 | 2 | . | 2 | . | . | ||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 72 | 62 | 42 | 16 | 14 | 8 | 10 | 4 | . | . | . | ||||||
| Marsh Fritillary | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 88 | 90 | 12 | 16 | 6 | . | . | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | 8 | 24 | 78 | 28 | 144 | 148 | 288 | 220 | 136 | 286 | 302 | 294 | 22 | ||||||
| Small Heath | . | . | . | . | 2 | 2 | 12 | 28 | 34 | 74 | 24 | 8 | 4 | 10 | 2 | . | . | 6 | 6 | 6 | ||||||
| Ringlet | . | . | . | . | . | . | . | . | . | 6 | 4 | 2 | . | . | . | . | . | . | . | . | ||||||