
| 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 | . | . | . | . | . | . | . | . | . | 10 | 7 | 27 | 57 | 6 | 24 | 6 | 6 | 1 | 1 | . | . | |||||
| Silver-spotted Skipper | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||
| Large Skipper | 13 | . | . | . | . | . | . | 2 | . | 1 | 6 | 3 | . | 1 | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | 12 | . | . | . | 3 | 3 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | 41 | . | 2 | 5 | 7 | 5 | 9 | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | . | |||||
| Brimstone | 41 | . | 3 | 6 | 4 | . | 2 | 1 | 3 | . | . | . | . | 3 | 1 | 8 | 1 | 1 | 2 | . | 1 | 1 | |||||
| Large White | 30 | . | . | . | . | . | . | . | . | . | 1 | 3 | 2 | 2 | 5 | 5 | 6 | 3 | . | 2 | 1 | . | |||||
| Small White | 27 | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 4 | 8 | 3 | 1 | . | . | 7 | . | |||||
| Green-veined White | 6 | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Orange Tip | 12 | . | 1 | 2 | 3 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | 3 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | 5 | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | 1 | . | 1 | . | 1 | . | . | . | |||||
| Small Blue | 7 | . | . | . | . | 2 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brown Argus | 12 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 4 | 2 | 2 | . | . | |||||
| Common Blue | 61 | . | . | . | . | 3 | 6 | 5 | 5 | 1 | . | . | . | . | . | 2 | 5 | 6 | 6 | 14 | 4 | 2 | |||||
| Chalk-hill Blue | 53 | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 12 | 13 | 16 | 6 | 2 | . | 1 | |||||
| Adonis Blue | 108 | . | . | . | . | 31 | 34 | 7 | 2 | . | . | . | . | . | . | . | . | 3 | 4 | 14 | . | 11 | |||||
| Holly Blue | 6 | . | . | 1 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | 4 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | 1 | . | . | |||||
| Small Tortoiseshell | 9 | . | . | . | . | . | . | . | . | . | . | 2 | . | 3 | . | 2 | . | . | . | . | 1 | 1 | |||||
| Peacock | 12 | 4 | . | . | 1 | . | . | . | . | . | . | . | . | 2 | . | 1 | 1 | 1 | . | . | . | . | |||||
| Dark Green Fritillary | 134 | . | . | . | . | . | . | . | . | 6 | 39 | 28 | 24 | 28 | 2 | 4 | 2 | 1 | . | . | . | . | |||||
| Speckled Wood | 5 | 1 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||
| Marbled White | 369 | . | . | . | . | . | . | . | . | 12 | 153 | 124 | 44 | 28 | 3 | 5 | . | . | . | . | . | . | |||||
| Grayling | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 100 | . | . | . | . | . | . | . | . | . | 1 | 4 | 12 | 41 | 18 | 16 | 5 | 3 | . | . | . | . | |||||
| Meadow Brown | 4344 | . | . | . | . | . | 1 | 5 | 37 | 85 | 132 | 96 | 117 | 253 | 426 | 530 | 717 | 992 | 492 | 355 | 74 | 29 | |||||
| Small Heath | 335 | . | . | . | . | 8 | 12 | 9 | 27 | 35 | 56 | 80 | 40 | 40 | 4 | 15 | 1 | 2 | 1 | 3 | 1 | . | |||||
| Ringlet | 58 | . | . | . | . | . | . | . | . | 5 | 28 | 16 | 7 | 2 | . | . | . | . | . | . | . | . | |||||