
| 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 | . | . | . | . | . | . | . | 4 | 4 | 4 | 4 | 12 | 38 | 50 | 22 | 28 | 4 | . | 2 | |||||||
| Large Skipper | . | . | . | . | . | . | . | . | . | . | 8 | 12 | . | . | . | . | . | . | . | |||||||
| Wood White | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | |||||||
| Brimstone | . | 2 | 2 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Large White | . | . | . | 2 | . | 4 | . | 2 | . | 4 | 10 | 8 | 30 | 4 | 2 | 6 | 4 | . | 4 | |||||||
| Small White | 10 | . | 8 | 6 | . | 2 | . | . | . | . | 10 | 24 | 12 | 4 | 6 | 6 | 16 | 2 | 4 | |||||||
| Green-veined White | 16 | 8 | 20 | 14 | 14 | 2 | . | . | . | 12 | . | 2 | 34 | 38 | 24 | 46 | . | 6 | . | |||||||
| Orange Tip | 4 | 6 | 8 | . | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | |||||||
| Common Blue | . | . | . | . | . | 42 | 8 | 28 | 6 | . | . | . | 2 | 2 | 16 | 32 | 42 | 16 | 44 | |||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | |||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 6 | . | . | . | . | |||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 4 | 6 | 12 | |||||||
| Peacock | . | 6 | 2 | . | . | . | . | . | . | . | . | . | 4 | 2 | 6 | 14 | 4 | . | . | |||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | 2 | . | . | |||||||
| Marsh Fritillary | . | . | . | . | . | 10 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Speckled Wood | 4 | 4 | 2 | 6 | 4 | 6 | . | 2 | . | 2 | . | . | 2 | . | 8 | 8 | 4 | 14 | 24 | |||||||
| Marbled White | . | . | . | . | . | . | . | . | 4 | 14 | 44 | 16 | 18 | 8 | 2 | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 2 | 6 | 60 | 238 | 128 | 48 | 74 | 12 | 2 | . | |||||||
| Meadow Brown | . | . | . | . | . | . | . | 16 | 66 | 136 | 352 | 242 | 504 | 334 | 392 | 260 | 120 | 58 | 18 | |||||||
| Ringlet | . | . | . | . | . | . | . | 2 | 6 | 16 | . | 12 | 2 | . | . | . | . | . | . | |||||||