
| 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 | 375 | . | . | . | . | . | . | . | . | . | . | 2 | 12 | 41 | 111 | 101 | 40 | 34 | 3 | 2 | . | . | |||||
| Essex Skipper | 11 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 5 | 2 | 1 | . | . | . | . | . | |||||
| Large Skipper | 20 | . | . | . | . | . | . | . | 2 | 7 | 7 | 2 | . | 1 | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | 7 | . | . | . | . | . | . | 2 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | 34 | . | . | . | 2 | 2 | 1 | 3 | 12 | 1 | 4 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 8 | 2 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||
| Large White | 21 | . | . | . | 1 | . | 2 | 2 | 4 | 1 | 1 | . | 1 | 1 | 1 | . | 1 | 1 | . | . | . | . | |||||
| Small White | 22 | . | . | . | . | . | . | . | 2 | 1 | 1 | . | 1 | 1 | 1 | . | 3 | 4 | 1 | 1 | 1 | . | |||||
| Green-veined White | 29 | . | . | . | . | . | 2 | 1 | 1 | . | . | . | . | . | 2 | 2 | 6 | 5 | 2 | 3 | . | . | |||||
| Orange Tip | 7 | . | . | 1 | . | 1 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | 216 | . | . | . | . | . | . | . | . | . | . | . | . | . | 50 | 71 | 51 | 34 | 2 | . | . | . | |||||
| Small Copper | 45 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 4 | 4 | 7 | 8 | 9 | . | |||||
| Brown Argus | 33 | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | 1 | 3 | 7 | 7 | 5 | |||||
| Common Blue | 53 | . | . | . | . | . | . | . | . | . | 2 | 2 | 1 | 1 | . | . | . | 1 | 12 | 9 | 10 | 2 | |||||
| Holly Blue | 2 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Duke of Burgundy Fritillary | 15 | . | . | . | . | 2 | 1 | 5 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| White Admiral | 9 | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 3 | 1 | 1 | . | . | . | . | . | |||||
| Red Admiral | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | |||||
| Small Tortoiseshell | 24 | 1 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 2 | 2 | . | . | 3 | 3 | |||||
| Peacock | 52 | 2 | 5 | 3 | 2 | 2 | 1 | . | . | . | . | . | . | . | . | . | 3 | 17 | 2 | . | 1 | . | |||||
| Comma | 10 | . | . | 2 | . | . | . | . | . | . | . | . | . | 1 | 4 | . | . | . | . | . | . | 1 | |||||
| Small Pearl-bordered Fritillary | 54 | . | . | . | . | . | . | . | 18 | 10 | 7 | 7 | 3 | . | . | . | . | . | . | . | . | . | |||||
| Pearl-bordered Fritillary | 23 | . | . | . | . | . | 5 | 7 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Silver-washed Fritillary | 31 | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 6 | 6 | 6 | 6 | . | . | . | . | |||||
| Marsh Fritillary | 2 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | 165 | 1 | . | 1 | . | . | . | 2 | 9 | 6 | 5 | 5 | 1 | 1 | . | . | 2 | 2 | 44 | 21 | 16 | 7 | |||||
| Wall Brown | 9 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 2 | . | 2 | 2 | . | . | |||||
| Marbled White | 129 | . | . | . | . | . | . | . | . | . | . | . | 20 | 50 | 37 | 16 | 4 | 1 | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 559 | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 54 | 87 | 155 | 150 | 17 | 5 | . | . | |||||
| Meadow Brown | 103 | . | . | . | . | . | . | . | . | 3 | 7 | 9 | 13 | 20 | 20 | 6 | 7 | 5 | 4 | 4 | . | . | |||||
| Small Heath | 26 | . | . | . | . | . | . | . | 5 | 4 | 8 | 1 | . | . | . | . | . | . | 3 | . | . | . | |||||
| Ringlet | 160 | . | . | . | . | . | . | . | . | . | 7 | 12 | 34 | 63 | 24 | 16 | 2 | 1 | . | . | . | . | |||||
| Unknown White | 41 | . | . | . | 3 | 1 | 1 | 2 | 2 | 1 | . | 1 | . | . | 3 | 7 | 2 | 11 | 1 | . | . | . | |||||