
| 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/Essex Skipper | . | . | . | . | . | . | . | . | . | . | 10 | 12 | 14 | 21 | 6 | 7 | 2 | . | . | . | . | . | . | . | ||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 5 | 4 | 7 | . | 1 | . | . | ||
| Large Skipper | . | . | . | . | . | . | . | . | 1 | 3 | 1 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | ||
| Dingy Skipper | . | . | . | 10 | 15 | 36 | 14 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Grizzled Skipper | . | . | 1 | 10 | 3 | 2 | . | 1 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | ||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||
| Brimstone | 2 | 2 | 2 | 4 | 3 | 1 | . | 5 | 1 | . | . | . | . | 8 | 5 | 2 | 2 | . | . | . | . | . | . | . | ||
| Large White | . | . | . | . | . | 2 | 1 | 2 | . | . | . | . | 1 | 5 | 2 | 3 | 3 | 1 | . | 3 | . | . | . | 1 | ||
| Small White | . | . | . | . | . | . | 6 | . | 1 | 1 | 1 | 1 | 6 | 4 | 8 | 4 | 5 | 9 | 10 | 2 | 3 | . | 1 | . | ||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | 1 | . | . | . | ||
| Orange Tip | . | . | 1 | 4 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Green Hairstreak | . | . | 4 | 5 | 3 | 3 | 3 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | 1 | 1 | ||
| Brown Argus | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | 1 | . | 6 | 5 | 4 | 4 | 7 | 2 | . | . | ||
| Common Blue | . | . | . | . | . | 4 | 4 | 1 | 12 | 4 | . | . | . | 1 | 4 | 13 | 15 | 18 | 14 | 12 | 2 | 6 | 2 | . | ||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 47 | 651 | 832 | 581 | 240 | 108 | 30 | 10 | 8 | . | . | ||
| Adonis Blue | . | . | . | . | . | 3 | 296 | 318 | 155 | 72 | . | . | . | . | . | 1 | 1 | 13 | 26 | 22 | 4 | 5 | 1 | . | ||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | ||
| Red Admiral | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 2 | . | . | . | . | . | . | 1 | . | . | . | ||
| Painted Lady | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | ||
| Small Tortoiseshell | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Peacock | . | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||
| Comma | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | . | ||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | 3 | 1 | . | . | . | . | . | . | ||
| Speckled Wood | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 1 | . | 1 | 3 | . | . | 1 | ||
| Marbled White | . | . | . | . | . | . | . | . | . | 1 | 45 | 86 | 81 | 41 | 8 | 1 | . | . | . | . | . | . | . | . | ||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 33 | 59 | 28 | 25 | 9 | 1 | . | . | . | . | . | ||
| Meadow Brown | . | . | . | . | . | . | . | . | 1 | 12 | 46 | 47 | 60 | 56 | 104 | 88 | 147 | 117 | 73 | 57 | 50 | 34 | 27 | 5 | ||
| Small Heath | . | . | . | . | 3 | 4 | 6 | 1 | 29 | 32 | 37 | 28 | 19 | 11 | 3 | 2 | 5 | 1 | 2 | 3 | 12 | 21 | 2 | 5 | ||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 5 | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||