
| 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/Essex Skipper | 38 | . | . | . | . | . | . | . | . | . | . | 3 | 6 | 13 | 14 | 8 | 5 | . | 1 | . | . | . | . | . | |||
| Silver-spotted Skipper | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | . | 1 | . | . | . | . | . | . | |||
| Large Skipper | 41 | . | . | . | . | . | . | 9 | 10 | 11 | 7 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | 32 | . | . | . | 5 | 22 | 22 | 12 | 16 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | 8 | . | . | 1 | 15 | 3 | 12 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 216 | 7 | 15 | 17 | 8 | 3 | 7 | 9 | 3 | 1 | 1 | . | . | 1 | 11 | 35 | 28 | . | . | 5 | . | . | . | . | |||
| Large White | 36 | . | . | . | 1 | . | . | . | . | . | . | . | 2 | 8 | . | 9 | 6 | . | 1 | 1 | . | 2 | . | . | |||
| Small White | 51 | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 1 | 8 | 6 | 1 | 1 | 4 | 3 | 4 | . | 1 | |||
| Green-veined White | 64 | . | . | . | 3 | . | . | . | 1 | . | . | . | . | . | 2 | 12 | 7 | 1 | . | 8 | 2 | 3 | 2 | . | |||
| Orange Tip | 2 | . | 1 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | 22 | . | 1 | . | 15 | 3 | 9 | 5 | 9 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brown Hairstreak | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | |||
| Small Copper | 9 | . | . | . | 1 | . | 2 | 1 | . | 1 | . | . | . | 1 | 1 | . | 1 | . | 1 | . | . | 2 | . | 1 | |||
| Small Blue | 18 | . | . | . | . | 1 | 8 | 4 | 2 | . | . | . | . | . | . | . | 3 | 3 | . | . | . | . | . | . | |||
| Brown Argus | 67 | . | . | . | . | . | 4 | 7 | 5 | 2 | . | . | . | . | . | 3 | 13 | 9 | 2 | 6 | 1 | . | . | . | |||
| Common Blue | 230 | . | . | . | . | . | 18 | 38 | 65 | 33 | 8 | 5 | . | 1 | . | 4 | 15 | 28 | 10 | 22 | 11 | 5 | . | 1 | |||
| Chalk-hill Blue | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||
| Holly Blue | 21 | . | . | . | 6 | 3 | 1 | . | . | . | . | . | . | . | 1 | 9 | . | . | . | . | . | . | . | . | |||
| Duke of Burgundy Fritillary | 1 | . | . | 3 | 8 | 6 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Painted Lady | 2 | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Tortoiseshell | 4 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | 1 | |||
| Peacock | 4 | 4 | . | 3 | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||
| Comma | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | 3 | . | . | . | 5 | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Dark Green Fritillary | 532 | . | . | . | . | . | . | . | . | 43 | 113 | 96 | 20 | 38 | 26 | 21 | 8 | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | |||
| Marsh Fritillary | 33 | . | . | . | . | . | 4 | 16 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Speckled Wood | 126 | 1 | 3 | 2 | 3 | 2 | 3 | 4 | 11 | 6 | 6 | 4 | . | 2 | . | 10 | 5 | 6 | 2 | 12 | 7 | 4 | . | 3 | |||
| Marbled White | 264 | . | . | . | . | . | . | . | . | 12 | 55 | 55 | 44 | 55 | 34 | 9 | . | . | . | . | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 170 | . | . | . | . | . | . | . | . | . | . | . | 1 | 12 | 33 | 51 | 24 | 8 | 1 | . | . | . | . | . | |||
| Meadow Brown | 2176 | . | . | . | . | . | . | . | . | 8 | 13 | 13 | 15 | 23 | 25 | 153 | 412 | 752 | 223 | 160 | 124 | 78 | 58 | 50 | |||
| Small Heath | 389 | . | . | . | . | 1 | 8 | 26 | 24 | 27 | 76 | 45 | 17 | 63 | 24 | 16 | 6 | 4 | 1 | 5 | . | . | . | . | |||
| Ringlet | 126 | . | . | . | . | . | . | . | . | 25 | 29 | 28 | 22 | . | 3 | . | . | . | . | . | . | . | . | . | |||