
| 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 | . | . | . | . | . | . | . | . | . | . | . | 23 | 60 | 74 | 71 | 52 | 8 | 4 | 1 | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | . | 2 | 7 | 13 | 9 | 16 | 5 | 8 | 13 | 8 | 1 | . | . | . | |||||
| Dingy Skipper | . | . | . | . | 11 | 3 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 7 | 4 | . | 8 | 7 | 10 | 5 | 2 | 8 | 1 | 6 | . | 2 | 3 | 3 | 12 | 3 | 1 | . | . | . | |||||
| Large White | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | 3 | 11 | 3 | . | . | . | |||||
| Small White | . | . | . | 1 | 3 | 4 | 1 | 3 | . | . | . | . | 2 | 20 | 46 | 80 | 74 | 118 | 52 | 37 | 35 | |||||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 2 | 3 | 2 | 2 | . | |||||
| Orange Tip | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | . | 2 | . | 1 | 1 | . | . | . | . | . | . | . | . | 1 | 3 | 2 | 1 | 1 | 5 | 1 | |||||
| Small Blue | . | . | . | . | . | 2 | 11 | 3 | 9 | 1 | 4 | 1 | 1 | . | . | 4 | 2 | 1 | 4 | 2 | . | |||||
| Brown Argus | . | . | . | . | . | . | 3 | 3 | 5 | . | 1 | . | . | . | 1 | 14 | 14 | 11 | 8 | 14 | 5 | |||||
| Common Blue | . | . | . | . | . | . | 10 | 4 | 6 | 7 | 12 | 3 | 2 | 5 | 6 | 16 | 28 | 25 | 38 | 24 | 8 | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 4 | 10 | 4 | . | . | . | |||||
| Adonis Blue | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 5 | 5 | 5 | 5 | 1 | |||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | 2 | 1 | . | . | . | . | |||||
| Painted Lady | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | |||||
| Small Tortoiseshell | 2 | . | . | . | . | . | . | . | . | . | 1 | 2 | 6 | . | . | 1 | 23 | 23 | 1 | 3 | . | |||||
| Peacock | 4 | 3 | 1 | 1 | . | 1 | . | . | . | . | . | . | . | 3 | 3 | 6 | . | . | . | . | . | |||||
| Comma | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | . | |||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 6 | 7 | 2 | 4 | 6 | . | . | . | . | |||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | 4 | 4 | 7 | 9 | 2 | 6 | . | . | . | . | . | |||||
| Speckled Wood | . | . | 1 | 2 | 3 | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 3 | 3 | 1 | . | |||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 9 | 101 | 88 | 14 | 15 | 4 | 2 | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 19 | 51 | 50 | 27 | 8 | 1 | 3 | 1 | |||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 3 | 12 | 83 | 82 | 25 | 50 | 80 | 102 | 46 | 11 | 9 | 5 | |||||
| Small Heath | . | . | . | . | . | 2 | 6 | 9 | 9 | 15 | 18 | 15 | 11 | . | 2 | . | 12 | 7 | 22 | 15 | 8 | |||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | . | 19 | 33 | 24 | 21 | 20 | . | 2 | . | . | . | |||||