
| 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 | ||||||||||||||||||||||||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 14 | 4 | 4 | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | . | . | 10 | 4 | 4 | 4 | . | 2 | . | . | . | . | . | . | ||||||
| Grizzled Skipper | . | . | . | 2 | 6 | 2 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 2 | 6 | 12 | 4 | 2 | 8 | 2 | 4 | 2 | . | . | 2 | 10 | 6 | 10 | . | . | 6 | . | . | ||||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | 2 | 20 | 6 | 4 | 4 | 4 | . | . | . | ||||||
| Small White | . | . | . | . | . | . | 4 | 2 | . | . | . | . | 14 | 6 | 6 | 2 | . | 6 | 2 | . | ||||||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 20 | 6 | 4 | . | . | . | . | ||||||
| Orange Tip | . | . | . | . | 4 | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | 2 | . | . | . | . | . | 4 | 2 | 20 | . | 4 | 2 | . | . | ||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 2 | 4 | 2 | . | . | . | ||||||
| Common Blue | . | . | . | . | . | . | 8 | 10 | . | 2 | 2 | . | . | 2 | 8 | 14 | 10 | 12 | . | . | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 38 | 2 | 2 | . | . | . | ||||||
| Holly Blue | . | . | . | 4 | 4 | . | 4 | . | 2 | . | . | . | . | 4 | 16 | 2 | . | . | . | . | ||||||
| Red Admiral | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | ||||||
| Small Tortoiseshell | 2 | . | 6 | . | . | . | . | 2 | . | 18 | . | 2 | 6 | . | . | . | 2 | . | . | . | ||||||
| Peacock | 2 | . | . | . | 2 | . | . | . | . | . | . | . | . | 4 | 2 | . | 2 | . | . | . | ||||||
| Comma | 2 | 2 | . | . | . | . | . | 2 | . | . | . | 4 | . | 10 | . | . | . | . | . | . | ||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | ||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | ||||||
| Speckled Wood | . | . | . | . | . | . | . | 4 | 2 | . | 6 | . | . | . | . | . | . | 4 | 6 | 2 | ||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 8 | . | 36 | 22 | 12 | 4 | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 48 | 90 | 44 | 20 | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 6 | 86 | 32 | 62 | 124 | 122 | 182 | 108 | 48 | 36 | 16 | 16 | ||||||
| Small Heath | . | . | . | . | . | . | . | 4 | 22 | 10 | 4 | 18 | . | . | . | . | . | . | . | . | ||||||
| Ringlet | . | . | . | . | . | . | . | . | 2 | 34 | . | 36 | 24 | 2 | 4 | . | . | . | . | . | ||||||