
| 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 | . | . | . | . | . | . | . | . | 9 | . | 25 | 39 | 6 | 10 | 1 | . | . | . | . | |||||||
| Large Skipper | . | . | . | . | . | . | . | . | 3 | 7 | 5 | . | . | . | . | . | . | . | . | |||||||
| Dingy Skipper | . | . | . | 3 | . | 4 | 5 | 6 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 2 | 1 | . | . | . | |||||||
| Brimstone | 2 | . | . | . | . | . | 1 | . | . | . | . | 2 | . | 3 | . | . | . | . | . | |||||||
| Large White | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | |||||||
| Small White | . | . | . | . | . | 1 | 1 | . | 3 | . | 2 | 17 | 13 | 6 | . | 5 | 2 | . | 2 | |||||||
| Green-veined White | . | . | . | 1 | . | . | 2 | 3 | . | . | . | . | 3 | 4 | 1 | 5 | 4 | 4 | . | |||||||
| Orange Tip | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | . | . | . | . | . | . | . | 3 | . | . | . | 7 | 9 | 6 | 4 | . | . | . | . | |||||||
| Small Blue | . | . | . | . | 1 | . | . | 4 | 1 | . | . | . | . | . | . | . | . | . | . | |||||||
| Brown Argus | . | . | . | . | . | 1 | 2 | 5 | 2 | . | 1 | 10 | 9 | 10 | 14 | 4 | 1 | . | . | |||||||
| Common Blue | . | . | . | . | . | . | . | 34 | 40 | 28 | 18 | 26 | 12 | 45 | 121 | 85 | 34 | 19 | 4 | |||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 65 | 54 | 67 | 53 | 48 | 12 | 3 | . | |||||||
| Adonis Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 8 | 4 | 3 | . | |||||||
| Red Admiral | . | . | . | . | . | . | . | 2 | . | . | . | 5 | 5 | 9 | . | 1 | . | . | . | |||||||
| Painted Lady | . | . | . | . | . | . | . | 15 | . | 3 | 1 | 55 | 70 | 27 | 4 | . | . | . | . | |||||||
| Small Tortoiseshell | . | 1 | 1 | 1 | . | . | . | . | . | . | 8 | 1 | 1 | . | . | 1 | 4 | 4 | 3 | |||||||
| Peacock | 4 | . | 2 | 6 | . | . | 3 | 5 | . | 2 | . | 8 | 14 | 12 | . | 1 | 2 | . | 1 | |||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | 1 | 1 | . | 4 | . | . | . | . | . | . | . | |||||||
| Marsh Fritillary | . | . | . | . | . | . | 2 | 7 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Speckled Wood | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 4 | 1 | |||||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||||||
| Marbled White | . | . | . | . | . | . | . | . | 22 | 6 | 67 | 34 | 13 | 1 | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 1 | . | 5 | 17 | 7 | 8 | . | . | . | . | . | |||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 49 | 19 | 96 | 128 | 113 | 57 | 21 | 5 | 4 | 11 | 1 | |||||||
| Small Heath | . | . | . | . | . | 1 | 4 | 14 | 32 | 38 | 13 | 1 | . | 2 | 24 | 31 | 67 | 34 | 8 | |||||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 2 | 5 | . | . | . | . | . | . | . | |||||||