
| 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 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 20 | . | . | . | . | . | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | . | . | 10 | 32 | 10 | 6 | 2 | . | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | . | 14 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | . | . | . | . | 2 | 2 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 4 | . | 2 | 26 | 2 | 8 | 6 | 2 | 4 | 2 | . | 4 | 4 | 8 | 4 | 2 | 8 | 4 | 4 | . | . | 2 | 2 | |||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | 6 | 4 | . | 2 | . | . | . | . | . | |||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | 16 | 8 | 14 | 14 | 4 | 6 | 2 | 8 | 2 | . | |||
| Orange Tip | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | . | . | . | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 4 | 2 | 4 | 4 | |||
| Brown Argus | . | . | . | . | . | . | . | 4 | 2 | . | . | . | . | . | . | 2 | 4 | 2 | . | . | . | 2 | . | |||
| Common Blue | . | . | . | . | . | . | . | 10 | 18 | 6 | 4 | . | . | . | 8 | 22 | 30 | 40 | 36 | 16 | 12 | 2 | . | |||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 4 | 10 | 40 | 46 | 6 | 32 | 10 | 12 | 2 | . | . | . | |||
| Holly Blue | . | . | . | . | . | 2 | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | |||
| Duke of Burgundy Fritillary | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | |||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | |||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | |||
| Peacock | 2 | . | 6 | . | . | 6 | . | . | . | . | . | . | . | 2 | 24 | 2 | 4 | . | . | . | . | . | . | |||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | 2 | . | . | |||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | 4 | . | 2 | 8 | . | . | . | . | . | . | . | . | |||
| Speckled Wood | . | . | 2 | . | . | 2 | . | 2 | . | 2 | . | . | . | . | . | 2 | . | 4 | 6 | 4 | 8 | . | . | |||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 36 | 38 | 28 | 2 | 4 | . | . | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 4 | 26 | 56 | 136 | 42 | 60 | 12 | 4 | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 2 | 8 | 30 | 82 | 68 | 134 | 100 | 136 | 62 | 68 | 42 | 16 | . | . | |||
| Small Heath | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 10 | . | . | . | 2 | 4 | 2 | . | |||
| Ringlet | . | . | . | . | . | . | . | . | . | 6 | 80 | 54 | 30 | 6 | 6 | 2 | . | . | . | . | . | . | . | |||