
| 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 | 11 | 14 | 1 | 1 | . | . | 1 | . | . | . | . | |||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 13 | 7 | 5 | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | 1 | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | 5 | 7 | 6 | 1 | 7 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | 1 | 6 | 23 | 8 | 13 | 12 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 2 | 6 | 15 | 5 | 6 | 11 | . | 4 | 1 | . | . | . | . | 2 | 8 | 4 | 10 | . | 3 | 1 | 2 | |||||
| Large White | . | . | . | . | . | 1 | 1 | . | . | . | . | 1 | 1 | 4 | 5 | 1 | 2 | 2 | 2 | . | . | |||||
| Small White | . | . | . | . | . | . | 1 | . | . | . | . | 3 | 2 | 11 | 10 | 2 | . | . | . | . | . | |||||
| Green-veined White | 1 | 3 | 2 | 3 | 2 | . | . | . | . | . | . | 3 | 3 | 1 | 5 | 1 | . | . | . | . | . | |||||
| Orange Tip | 2 | 2 | 6 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | 1 | 4 | 4 | 7 | 4 | 3 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | 1 | 1 | 1 | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | 1 | . | . | |||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | . | 1 | 1 | 1 | . | . | |||||
| Common Blue | . | . | . | 3 | 16 | 21 | 5 | 6 | 6 | 2 | . | 3 | 3 | 30 | 6 | 15 | 43 | 51 | 12 | 6 | 2 | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | 1 | 13 | 186 | 125 | 325 | 187 | 198 | 92 | 11 | 13 | 1 | . | |||||
| Adonis Blue | . | . | . | . | . | 2 | 1 | 3 | . | . | . | . | . | 1 | . | . | 5 | 13 | 7 | 4 | 5 | |||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | |||||
| Duke of Burgundy Fritillary | . | 1 | . | 3 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | 1 | . | 1 | 1 | 1 | . | . | . | . | . | . | 1 | . | . | |||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | 1 | . | . | 1 | 1 | |||||
| Peacock | 1 | . | . | 1 | . | . | 1 | . | . | . | . | 1 | 5 | 8 | 9 | 1 | 1 | . | 1 | . | 1 | |||||
| Pearl-bordered Fritillary | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Marsh Fritillary | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | 1 | 1 | 6 | 3 | 2 | 3 | 1 | 5 | 2 | 3 | . | 2 | 1 | 4 | . | 5 | 5 | 6 | 9 | 7 | 4 | |||||
| Wall Brown | . | . | . | . | . | . | 2 | . | . | . | . | . | . | 1 | . | 2 | 2 | 1 | . | . | . | |||||
| Marbled White | . | . | . | . | . | . | . | . | 6 | 24 | 18 | 16 | 4 | 1 | . | . | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 8 | 30 | 12 | 22 | 7 | 6 | 2 | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | 26 | 48 | 48 | 48 | 99 | 90 | 170 | 110 | 198 | 156 | 120 | 66 | 31 | 8 | |||||
| Small Heath | . | . | . | 5 | 19 | 23 | 13 | 25 | 47 | 37 | 7 | 5 | . | 1 | . | 11 | 22 | 19 | 7 | 2 | 1 | |||||
| Ringlet | . | . | . | . | . | . | . | 1 | 5 | 15 | 12 | 1 | 2 | . | . | . | . | . | . | . | . | |||||