
| 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 | 112 | . | . | . | . | . | . | 6 | 34 | 17 | 16 | 12 | 2 | . | . | . | . | . | . | ||||||||
| Essex Skipper | 13 | . | . | . | . | . | . | . | . | 5 | 4 | 2 | . | . | . | . | . | . | . | ||||||||
| Large Skipper | 39 | . | . | . | . | . | . | 1 | 7 | 10 | 7 | 5 | 1 | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | 27 | . | . | 12 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 85 | 9 | 10 | 4 | . | . | . | . | . | . | 3 | 6 | 4 | 11 | 2 | 3 | 4 | 1 | 1 | ||||||||
| Large White | 50 | . | . | . | . | . | . | . | . | . | 5 | . | 3 | 9 | 2 | 8 | 10 | 10 | 3 | ||||||||
| Small White | 9 | . | . | . | 1 | . | . | . | . | . | 1 | . | . | . | . | 4 | 1 | . | . | ||||||||
| Green-veined White | 31 | . | . | 3 | 2 | . | . | . | . | 2 | 4 | . | . | 1 | 3 | 5 | 4 | 2 | 1 | ||||||||
| Orange Tip | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | 24 | . | 2 | 8 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | 52 | . | . | 1 | 3 | . | . | . | . | 1 | . | 3 | 3 | 3 | 1 | 1 | 3 | 6 | 11 | ||||||||
| Silver-studded Blue | 91 | . | . | 3 | 16 | 4 | 4 | 1 | 10 | 3 | 5 | 12 | 6 | 6 | 8 | 9 | . | . | . | ||||||||
| Brown Argus | 59 | . | . | 4 | . | 3 | 1 | 1 | . | . | . | 7 | . | 2 | 5 | 20 | 1 | 7 | 2 | ||||||||
| Common Blue | 113 | . | . | 10 | 32 | 8 | 3 | 2 | 1 | . | 1 | 1 | 5 | 8 | 15 | 13 | 4 | 1 | . | ||||||||
| Holly Blue | 8 | . | . | . | 2 | 1 | . | . | . | . | . | 2 | . | 2 | . | 1 | . | . | . | ||||||||
| Red Admiral | 9 | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | 1 | 1 | 1 | 3 | ||||||||
| Painted Lady | 6 | . | . | . | . | . | 1 | . | . | . | . | . | . | 2 | 1 | . | . | 1 | . | ||||||||
| Small Tortoiseshell | 10 | 1 | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | 5 | . | ||||||||
| Peacock | 113 | 18 | 13 | 1 | . | . | . | . | . | 2 | 4 | . | 7 | 2 | 1 | 3 | . | . | 1 | ||||||||
| Comma | 16 | 7 | . | . | . | . | . | . | . | 1 | . | . | 1 | 1 | . | . | . | . | 3 | ||||||||
| Speckled Wood | 42 | . | 3 | 2 | 1 | 11 | . | . | 1 | 2 | . | 4 | 3 | 4 | 3 | 3 | . | . | . | ||||||||
| Marbled White | 2 | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | ||||||||
| Grayling | 1438 | . | . | . | . | . | . | . | . | 60 | 107 | 261 | 316 | 192 | 203 | 186 | 43 | 34 | 4 | ||||||||
| Gatekeeper / Hedge Brown | 899 | . | . | . | . | . | . | . | . | 67 | 81 | 155 | 284 | 146 | 66 | 55 | 12 | . | . | ||||||||
| Meadow Brown | 690 | . | . | . | . | 1 | 2 | 8 | 47 | 77 | 96 | 107 | 104 | 58 | 55 | 48 | 15 | 9 | 1 | ||||||||
| Small Heath | 423 | . | . | 3 | . | 7 | 17 | 47 | 89 | 47 | 44 | 25 | 9 | 2 | 9 | 10 | 11 | 20 | 7 | ||||||||
| Ringlet | 4 | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | . | ||||||||