
| 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 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 3 | 6 | 3 | 2 | 1 | . | . | . | . | |||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 11 | 7 | 2 | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | 1 | . | . | 2 | 2 | . | 4 | 2 | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | . | . | 3 | 12 | 8 | 3 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | . | . | . | . | 4 | 11 | 19 | 8 | 18 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Pale Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | |||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 3 | 12 | 7 | 13 | 4 | 6 | 4 | . | |||
| Brimstone | 2 | 1 | 1 | 1 | . | 18 | 12 | 8 | 13 | 15 | 4 | 1 | . | 3 | . | 16 | . | 24 | 49 | 7 | 7 | 9 | 1 | |||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 4 | 2 | 6 | . | . | . | |||
| Small White | . | . | . | . | . | . | . | . | 1 | 1 | 2 | . | . | . | 3 | 22 | 8 | 19 | 15 | 4 | 3 | 1 | 1 | |||
| Green-veined White | . | . | . | 1 | . | . | 2 | 1 | 1 | . | . | . | . | . | . | 1 | 1 | 1 | 1 | . | . | 1 | . | |||
| Orange Tip | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | . | . | . | . | . | 1 | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | 1 | 4 | 4 | 2 | 2 | 2 | . | |||
| Brown Argus | . | . | . | . | . | . | . | 1 | 2 | 2 | . | 1 | . | . | . | 4 | 16 | 16 | 17 | 12 | 19 | 11 | 13 | |||
| Common Blue | . | . | . | . | . | . | 1 | 21 | 65 | 62 | 44 | 5 | 3 | 6 | . | 63 | 92 | 170 | 516 | 198 | 80 | 35 | 13 | |||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 13 | 504 | 1081 | 947 | 874 | 160 | 278 | 77 | 19 | |||
| Adonis Blue | . | . | . | . | . | . | . | 5 | 47 | 40 | 8 | . | . | . | . | . | . | . | 14 | 128 | 283 | 163 | 128 | |||
| Holly Blue | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | |||
| Duke of Burgundy Fritillary | . | . | . | . | . | . | . | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | 2 | 1 | . | 2 | 2 | . | . | . | . | 4 | 2 | 5 | 15 | 27 | 26 | 10 | . | . | . | |||
| Painted Lady | . | . | . | . | 1 | . | 2 | 27 | 33 | 33 | 14 | 2 | 2 | 6 | 8 | 96 | 56 | 43 | 26 | 5 | 1 | 1 | . | |||
| Small Tortoiseshell | . | 1 | . | . | . | . | . | . | . | . | 1 | 3 | 1 | 1 | 6 | 7 | 2 | 3 | 1 | 3 | 1 | 1 | 1 | |||
| Peacock | 1 | 3 | 2 | . | 2 | 3 | . | . | . | . | 2 | . | . | . | . | 27 | 4 | 15 | . | 4 | 1 | . | . | |||
| Comma | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 1 | . | . | 1 | . | . | . | |||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||
| Marsh Fritillary | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Speckled Wood | . | . | . | . | 2 | 2 | . | . | 1 | 1 | . | 1 | . | . | . | . | 3 | 2 | 2 | 2 | 7 | 9 | 4 | |||
| Wall Brown | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | |||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 23 | 45 | 7 | 1 | 2 | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | 18 | 37 | 29 | 47 | 38 | 7 | 2 | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | . | . | . | 5 | 6 | 36 | 80 | 391 | 387 | 513 | 502 | 192 | 209 | 104 | 67 | |||
| Small Heath | . | . | . | . | . | . | . | 8 | 23 | 32 | 31 | 26 | 20 | 76 | 41 | 6 | 2 | 2 | 4 | 8 | 8 | 3 | 1 | |||
| Ringlet | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 1 | 1 | . | . | . | . | . | . | . | |||