
| 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 | . | . | . | . | . | . | . | . | . | 6 | 10 | 20 | 36 | 20 | 6 | . | . | . | . | . | . | |||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | 2 | . | 4 | 6 | 4 | 2 | . | . | . | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | 6 | 20 | 14 | 8 | 2 | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | . | 50 | 100 | 60 | 12 | 4 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | . | . | . | 4 | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 6 | . | . | . | . | |||||
| Brimstone | 4 | 2 | 14 | 8 | 14 | . | . | . | 2 | . | . | . | . | . | 2 | . | . | 2 | 2 | 6 | . | |||||
| Large White | . | . | . | 14 | 2 | . | . | 4 | . | . | . | 32 | 26 | 20 | 30 | 14 | 20 | 10 | 6 | . | . | |||||
| Small White | 2 | 4 | . | 30 | 34 | 22 | 8 | 8 | 4 | . | 38 | 30 | 60 | 118 | 62 | 38 | 16 | 20 | 6 | . | . | |||||
| Green-veined White | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | |||||
| Orange Tip | . | . | 2 | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | . | . | . | 20 | 18 | 4 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | . | . | 32 | 30 | 10 | 4 | . | . | . | . | 2 | . | 10 | 6 | . | . | . | . | . | . | |||||
| Small Blue | . | . | . | . | . | 4 | . | 4 | 2 | . | . | 2 | . | . | . | . | . | . | . | . | . | |||||
| Brown Argus | . | . | . | . | 22 | 6 | 12 | 6 | 2 | . | . | . | . | 18 | 10 | 30 | 30 | 4 | . | 8 | . | |||||
| Common Blue | . | . | . | . | . | 70 | 66 | 42 | 44 | 10 | 6 | . | 2 | 42 | 36 | 122 | 128 | 38 | 10 | 14 | . | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 2 | 8 | 90 | 36 | 24 | 18 | 2 | . | . | . | |||||
| Adonis Blue | . | . | . | . | 4 | 226 | 148 | 8 | 2 | . | . | . | . | . | 16 | 40 | 52 | 42 | . | 2 | . | |||||
| Holly Blue | . | . | . | 6 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | 4 | . | . | . | . | . | . | 4 | 2 | . | . | . | . | . | . | . | . | |||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | |||||
| Small Tortoiseshell | 10 | 12 | 24 | 4 | 2 | . | . | . | 6 | 6 | 42 | 150 | 30 | 2 | 10 | . | 6 | 2 | 6 | . | . | |||||
| Peacock | 6 | 4 | 8 | . | 2 | . | . | . | . | . | 2 | . | 4 | 8 | 6 | . | . | 2 | . | . | . | |||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | |||||
| Marbled White | . | . | . | . | . | . | . | . | 192 | 470 | 190 | 158 | 22 | . | . | . | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 38 | 54 | 126 | 10 | . | . | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | 26 | 380 | 400 | 130 | 512 | 96 | 194 | 56 | 44 | 12 | 18 | 4 | . | . | |||||
| Small Heath | . | . | . | 4 | 24 | 2 | 8 | 6 | 58 | 6 | 6 | 2 | . | 2 | . | 4 | 2 | 6 | . | . | . | |||||
| Ringlet | . | . | . | . | . | . | . | . | 18 | 12 | 10 | . | . | . | . | . | . | . | . | . | . | |||||