
| 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 | Ind | ||||||||||||||||||||||||||
| Small Skipper | NI | . | . | . | . | . | . | . | . | 6 | 19 | 21 | 4 | 1 | 1 | 1 | . | . | . | ||||||||
| Large Skipper | 9 | . | . | . | . | . | . | 1 | 4 | 3 | . | . | . | . | . | . | . | . | . | ||||||||
| Dingy Skipper | 31 | . | . | 1 | 15 | 5 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | 31 | . | . | 1 | 14 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 87 | . | 2 | 5 | 13 | 2 | 2 | . | 2 | . | . | . | 2 | 2 | 1 | 20 | 13 | 6 | . | ||||||||
| Large White | 8 | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | 2 | . | 1 | 2 | . | ||||||||
| Small White | 18 | . | . | . | . | . | . | . | . | . | . | . | . | . | 11 | 3 | 3 | 1 | . | ||||||||
| Green-veined White | 19 | . | . | . | 1 | 1 | . | . | . | . | 2 | 1 | 4 | 1 | 3 | . | . | . | . | ||||||||
| Orange Tip | 3 | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | 7 | . | . | . | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | 10 | . | . | . | 1 | . | . | . | . | . | . | . | 4 | 1 | 1 | . | . | . | . | ||||||||
| Small Blue | 28 | . | . | . | 5 | 12 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brown Argus | 13 | . | . | . | . | 3 | 1 | 2 | . | . | . | . | . | . | . | 1 | 2 | . | . | ||||||||
| Common Blue | 109 | . | . | . | 1 | 11 | 17 | . | 13 | 9 | . | 1 | 2 | 3 | 3 | 11 | 7 | 10 | 6 | ||||||||
| Chalk-hill Blue | 37 | . | . | . | . | . | . | . | . | . | . | . | 3 | 8 | 9 | 9 | 3 | 3 | . | ||||||||
| Adonis Blue | 35 | . | . | . | . | 13 | 7 | . | . | . | . | . | . | . | . | . | 6 | 2 | 2 | ||||||||
| Holly Blue | 3 | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||||
| Painted Lady | 4 | . | . | . | 2 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Tortoiseshell | 9 | . | . | . | . | . | . | 1 | . | . | 1 | 1 | . | . | . | . | . | 1 | 2 | ||||||||
| Peacock | 17 | . | 1 | 1 | . | . | . | . | . | . | . | . | 3 | 5 | 2 | 2 | . | . | . | ||||||||
| Dark Green Fritillary | 101 | . | . | . | . | . | . | . | 1 | 23 | 11 | 34 | 8 | 2 | . | 1 | . | . | . | ||||||||
| Marsh Fritillary | 3 | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Marbled White | 351 | . | . | . | . | . | . | . | 4 | 157 | 98 | 61 | . | . | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | 116 | . | . | . | . | . | . | . | . | . | 21 | 31 | 23 | 10 | 3 | 1 | . | . | . | ||||||||
| Meadow Brown | 1012 | . | . | . | . | . | . | 5 | 21 | 55 | 87 | 68 | 89 | 90 | 144 | 123 | 99 | 74 | 50 | ||||||||
| Small Heath | 372 | . | . | . | 1 | 18 | 12 | 19 | 88 | 88 | 46 | 30 | 6 | 4 | 6 | 3 | 6 | 5 | 3 | ||||||||
| Ringlet | 44 | . | . | . | . | . | . | . | . | 6 | 21 | 10 | 1 | . | . | . | . | . | . | ||||||||