
| 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 | . | . | . | . | . | . | . | . | . | 10 | . | 28 | . | 3 | 3 | . | . | . | . | |||||||
| Large Skipper | . | . | . | . | . | . | . | . | 3 | 6 | 8 | 13 | 4 | 2 | . | . | . | . | . | |||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 4 | 2 | 2 | |||||||
| Brimstone | . | 1 | 4 | 1 | 3 | 9 | . | 3 | 4 | . | . | 2 | . | 3 | . | . | 3 | . | . | |||||||
| Large White | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | 4 | 3 | 10 | 4 | 3 | . | |||||||
| Small White | . | . | . | . | . | . | . | 1 | 3 | 4 | . | 1 | . | 5 | 5 | 3 | 3 | 3 | . | |||||||
| Green-veined White | . | . | . | . | 1 | 2 | . | 4 | . | . | . | 2 | 10 | 4 | 3 | 10 | 8 | . | 1 | |||||||
| Orange Tip | . | . | . | 2 | 2 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | . | . | . | . | . | . | . | 2 | 4 | 6 | 3 | 1 | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | 1 | . | . | |||||||
| Small Copper | . | . | . | . | 2 | 4 | . | . | . | . | . | . | . | 4 | 6 | 11 | 7 | 19 | 17 | |||||||
| Common Blue | . | . | . | . | . | . | . | 2 | 3 | 6 | 1 | . | 1 | 7 | 2 | 4 | 4 | 5 | . | |||||||
| Red Admiral | 1 | . | . | . | . | . | . | . | . | 2 | 4 | 11 | 8 | 5 | 3 | 4 | . | 3 | . | |||||||
| Painted Lady | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | 2 | . | . | . | 1 | . | |||||||
| Small Tortoiseshell | 3 | 2 | 3 | 2 | . | . | . | . | 1 | 4 | . | 2 | . | . | . | . | . | 1 | . | |||||||
| Peacock | 5 | 5 | 8 | 10 | 6 | 4 | 4 | 4 | . | . | . | . | 3 | 6 | 5 | 9 | 5 | 2 | . | |||||||
| Comma | 1 | 2 | . | 2 | . | . | . | . | . | 2 | . | 3 | 2 | 3 | 3 | . | 1 | 6 | 3 | |||||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | 41 | 56 | 35 | 12 | 1 | . | 1 | 6 | 8 | 9 | 8 | . | . | |||||||
| Pearl-bordered Fritillary | . | . | . | 2 | 20 | 36 | 10 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 8 | . | 6 | . | . | . | . | . | . | . | |||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | 2 | . | 10 | 4 | 3 | 3 | 8 | 2 | . | . | |||||||
| Speckled Wood | 3 | . | 2 | 7 | 13 | . | 4 | 4 | 3 | 8 | 6 | 15 | 19 | 9 | 23 | 16 | 15 | 19 | 5 | |||||||
| Wall Brown | . | . | . | . | . | 2 | . | . | . | . | . | . | . | 1 | 1 | 7 | . | . | . | |||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 10 | 10 | 20 | 1 | 19 | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 27 | 137 | 309 | 315 | 87 | 70 | . | . | |||||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 37 | 42 | 89 | 92 | 188 | 232 | 120 | 82 | 5 | 2 | |||||||
| Small Heath | . | . | . | . | . | . | 2 | 6 | 2 | 4 | . | 2 | . | 2 | . | 2 | 5 | . | . | |||||||
| Ringlet | . | . | . | . | . | . | . | . | . | 34 | 33 | 72 | 6 | 14 | 1 | . | . | . | . | |||||||