
| 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 | ||||||||||||||||||||||||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 4 | 11 | 14 | 11 | 2 | 1 | . | . | . | . | . | . | . | ||||
| Brimstone | 8 | 10 | 26 | 32 | 21 | 7 | 4 | 5 | . | . | 2 | 1 | 4 | 14 | 15 | . | 10 | 2 | 5 | 2 | 2 | . | ||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 3 | . | . | . | . | . | . | ||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 4 | . | 1 | 1 | 2 | 3 | . | ||||
| Green-veined White | . | . | . | 1 | 4 | 3 | . | 1 | . | . | . | 1 | 6 | 2 | 4 | 1 | . | 7 | 4 | 2 | . | . | ||||
| Orange Tip | . | . | 1 | 1 | 4 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | . | . | 7 | 6 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Common Blue | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||
| Holly Blue | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | . | 3 | 2 | . | 2 | . | 5 | 3 | ||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 2 | 2 | . | . | . | ||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 3 | 3 | . | 1 | . | . | . | ||||
| Peacock | 1 | 9 | 19 | 22 | 13 | 6 | 6 | 3 | 7 | . | . | . | . | 4 | 27 | 21 | 38 | 1 | 1 | . | . | . | ||||
| Comma | . | 3 | 3 | 1 | . | . | . | 1 | . | . | . | . | 4 | 1 | 2 | . | . | . | . | 2 | 2 | 16 | ||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | . | 3 | 3 | 3 | 1 | . | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 4 | 2 | 3 | . | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | 2 | 6 | 17 | 17 | 16 | 1 | . | . | . | . | . | ||||
| Speckled Wood | . | . | . | 13 | 19 | 10 | 5 | 9 | 34 | 58 | 47 | 35 | 21 | 7 | 42 | 37 | 25 | 62 | 74 | 96 | 74 | 41 | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | 41 | 53 | 14 | 4 | 1 | . | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | . | 1 | . | 12 | 33 | 46 | 53 | 27 | 4 | . | . | . | . | . | . | ||||
| Large Heath | . | . | . | . | . | . | . | 1 | 3 | 1 | 8 | 2 | 1 | . | . | . | . | . | . | . | . | . | ||||