
| 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 | 24 | . | . | . | . | . | . | . | . | 2 | . | . | 15 | 2 | 3 | . | . | . | . | . | |||||||
| Large Skipper | 4 | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | |||||||
| Dingy Skipper | 67 | . | . | 2 | 40 | 6 | 5 | 6 | 2 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | 77 | 7 | 10 | 6 | 38 | 5 | 2 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | 18 | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | 1 | . | 3 | 6 | 1 | . | |||||||
| Brimstone | 31 | . | . | . | 5 | . | 1 | 2 | . | . | . | 1 | . | 4 | . | . | 3 | 9 | . | . | |||||||
| Large White | 95 | . | . | 1 | 6 | . | 1 | 1 | 1 | 2 | . | 2 | 6 | 21 | 10 | 7 | 4 | 14 | 4 | 1 | |||||||
| Small White | 123 | 1 | 1 | 1 | 9 | 1 | . | . | . | . | . | 2 | 15 | 11 | 29 | 2 | 7 | 24 | 1 | . | |||||||
| Green-veined White | 10 | 1 | . | . | 1 | 1 | . | 1 | . | . | . | . | . | . | . | . | 3 | 1 | . | . | |||||||
| Orange Tip | 6 | . | . | 1 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | 8 | . | 1 | 2 | 4 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | 15 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 4 | 3 | 3 | |||||||
| Brown Argus | 43 | . | . | . | 3 | . | 3 | 1 | . | . | . | . | . | . | . | 1 | 6 | 15 | . | 1 | |||||||
| Common Blue | 305 | . | . | . | 6 | 8 | 9 | 37 | 8 | . | . | . | . | . | 16 | 3 | 28 | 72 | 18 | 14 | |||||||
| Chalk-hill Blue | 95 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 19 | 47 | 10 | . | 3 | . | 2 | |||||||
| Adonis Blue | 81 | . | . | . | . | . | 4 | . | 3 | . | . | . | . | . | . | . | 22 | 17 | 2 | 2 | |||||||
| Red Admiral | 23 | . | . | . | . | . | 2 | 2 | . | 2 | 1 | 1 | . | . | 1 | 3 | 1 | 3 | 1 | 2 | |||||||
| Painted Lady | 12 | . | . | . | . | . | 1 | 3 | . | . | . | . | . | . | 1 | . | 1 | 2 | . | . | |||||||
| Small Tortoiseshell | 256 | 2 | 1 | 2 | . | . | . | . | 1 | 1 | 1 | 1 | . | 1 | 3 | . | 28 | 92 | 31 | 18 | |||||||
| Peacock | 19 | 3 | . | . | 1 | . | 1 | . | . | . | . | . | . | 1 | . | 3 | 2 | 2 | . | . | |||||||
| Comma | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | |||||||
| Marsh Fritillary | 219 | . | . | . | 86 | 23 | 56 | 31 | 5 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Speckled Wood | 47 | 1 | . | . | 3 | . | 1 | 1 | 2 | . | 2 | 2 | . | . | . | . | 7 | . | 3 | 1 | |||||||
| Wall Brown | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 12 | . | . | |||||||
| Marbled White | 147 | . | . | . | . | . | . | . | 3 | 15 | 18 | 61 | 30 | 17 | 3 | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 266 | . | . | . | . | . | . | . | . | . | 1 | 16 | 94 | 349 | 76 | 10 | 4 | . | . | . | |||||||
| Meadow Brown | 2078 | . | . | . | . | . | . | 7 | 15 | 17 | 21 | 113 | 246 | 55 | 423 | 256 | 128 | 128 | 32 | 20 | |||||||
| Small Heath | 259 | . | . | . | 1 | . | 7 | . | 20 | 36 | 15 | 21 | 3 | . | 20 | . | 8 | 22 | 6 | 6 | |||||||
| Ringlet | 2 | . | . | . | . | . | . | 29 | . | . | . | . | 1 | 14 | 1 | . | . | . | . | . | |||||||