
| 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 | 10 | 40 | 16 | 56 | 14 | 24 | . | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | 4 | 8 | 2 | 4 | . | 6 | . | 8 | . | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | . | . | 12 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 4 | 10 | 14 | . | 8 | . | 2 | . | . | . | . | . | 4 | 12 | 22 | 8 | 2 | 8 | . | . | ||||||
| Large White | . | . | . | . | . | . | . | . | . | . | 4 | . | . | 2 | . | . | 2 | . | . | . | ||||||
| Small White | . | . | . | . | . | 2 | . | . | . | . | . | . | . | 6 | 12 | 4 | 10 | 8 | 2 | . | ||||||
| Green-veined White | . | . | . | . | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Orange Tip | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | ||||||
| Small Blue | . | . | . | 2 | 10 | 10 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brown Argus | . | . | . | 2 | 14 | 2 | . | . | . | . | . | . | 4 | . | 36 | 4 | 44 | . | . | . | ||||||
| Common Blue | . | . | . | 4 | 2 | 10 | 10 | 10 | 2 | . | . | . | . | 12 | 24 | 10 | 6 | 32 | 2 | . | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | 6 | 56 | 170 | 230 | 330 | 244 | 40 | . | . | . | ||||||
| Adonis Blue | . | . | . | 20 | 20 | 46 | 30 | 4 | . | . | . | . | . | . | 8 | 20 | 160 | 12 | . | 2 | ||||||
| Red Admiral | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | 2 | . | . | . | 2 | . | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 10 | 14 | . | 4 | ||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | 4 | . | . | 2 | 2 | . | . | 4 | 2 | 8 | 44 | 4 | 4 | ||||||
| Peacock | . | 2 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Dark Green Fritillary | . | . | . | . | . | . | 2 | . | 12 | 18 | 18 | 24 | 32 | 14 | 8 | . | . | . | . | . | ||||||
| Marbled White | . | . | . | . | . | . | . | 14 | 94 | 70 | 32 | 24 | . | 4 | . | . | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | 4 | 6 | 30 | 72 | 24 | 90 | 82 | 288 | 164 | 262 | 120 | 272 | 32 | 8 | 14 | ||||||
| Small Heath | . | . | . | . | . | . | 6 | 30 | 32 | 12 | 58 | 18 | 4 | 4 | 2 | . | 16 | . | . | . | ||||||
| Ringlet | . | . | . | . | . | . | . | . | 28 | 10 | 2 | 2 | . | . | . | . | . | . | . | . | ||||||