
| 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 | 45 | . | . | . | . | . | . | . | . | . | 4 | 9 | 8 | 14 | 6 | 4 | . | . | . | . | |||||||
| Essex Skipper | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||||
| Large Skipper | 21 | . | . | . | . | . | . | 3 | 3 | 7 | 4 | 2 | . | . | . | . | . | . | . | . | |||||||
| Dingy Skipper | 2 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | 36 | . | . | . | 2 | 10 | 6 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | 39 | 8 | 4 | 1 | 8 | 2 | . | . | 1 | . | . | 1 | . | . | . | 2 | 0.5 | 1 | . | . | |||||||
| Large White | 112 | . | . | . | 1 | 4 | 4 | 4 | 4 | 1 | . | 1 | 3 | 4 | 14 | 44 | 5.5 | 1 | 1 | . | |||||||
| Small White | 61 | . | . | . | . | 1 | . | 1 | . | . | 3 | 3 | 4 | 5 | 6 | 21 | 3 | 2 | 1 | . | |||||||
| Green-veined White | 68 | . | . | 3 | 2 | 4 | 3 | 2 | 1 | . | . | 3 | 8 | 6 | 3 | 6 | 8 | 2 | . | . | |||||||
| Orange Tip | 10 | . | . | 2 | 3 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | 18 | . | . | . | . | . | . | . | . | . | . | 10 | 2 | 4 | . | 1 | . | . | . | . | |||||||
| Small Copper | NI | . | . | . | . | 1 | . | 1 | . | . | . | 1 | . | 2 | 1 | 6 | 5.5 | . | . | . | |||||||
| Brown Argus | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1.5 | . | . | . | |||||||
| Common Blue | NI | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | 1 | 3.5 | 4 | 2 | . | |||||||
| Holly Blue | 3 | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Duke of Burgundy Fritillary | 8 | . | . | . | . | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| White Admiral | 24 | . | . | . | . | . | . | . | . | 3 | 6 | 7 | 4 | 3 | 1 | . | . | . | . | . | |||||||
| Red Admiral | 17 | . | . | . | . | . | . | 1 | 2 | 1 | . | 1 | 1 | 1 | 2 | . | 1.5 | 3 | . | . | |||||||
| Painted Lady | 7 | . | . | . | . | . | . | . | 1 | 1 | . | 1 | 1 | . | 1 | 1 | . | . | . | . | |||||||
| Small Tortoiseshell | 46 | . | 1 | . | . | . | . | . | 1 | 2 | 9 | 13 | 12 | 2 | . | 1 | . | . | 1 | 1 | |||||||
| Peacock | 160 | 6 | 9 | 3 | 8 | 5 | 2 | . | . | . | . | . | . | 9 | 70 | 22 | 2.5 | . | . | 1 | |||||||
| Comma | 35 | 7 | 2 | . | . | . | . | . | . | . | 5 | 7 | 5 | 2 | 1 | . | . | 2 | 1 | . | |||||||
| Pearl-bordered Fritillary | 17 | . | . | . | . | 3 | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Silver-washed Fritillary | 89 | . | . | . | . | . | . | . | . | 1 | 7 | 17 | 17 | 11 | 18 | 10 | 5 | . | . | . | |||||||
| Speckled Wood | 99 | . | . | . | 1 | 3 | 2 | 5 | 4 | 5 | 2 | . | . | . | 3 | 2 | 8 | 15 | 15 | 2 | |||||||
| Marbled White | 28 | . | . | . | . | . | . | . | . | . | 8 | 14 | 5 | . | 1 | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 240 | . | . | . | . | . | . | . | . | . | . | 9 | 12 | 27 | 44 | 46 | 37.5 | 3 | . | . | |||||||
| Meadow Brown | 644 | . | . | . | . | . | . | 6 | 17 | 66 | 128 | 133 | 111 | 68 | 36 | 41 | 6.5 | 1 | . | . | |||||||
| Small Heath | 5 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 1 | . | . | |||||||
| Ringlet | 184 | . | . | . | . | . | . | . | 3 | 22 | 77 | 47 | 28 | 5 | 2 | . | . | . | . | . | |||||||