
| 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 | NI | . | . | . | . | . | . | . | . | . | . | 8 | . | 17 | 6 | . | . | . | . | . | |||||||
| Large Skipper | 41 | . | . | . | . | . | . | . | . | . | . | . | 22 | 15 | 1 | . | 3 | . | . | . | |||||||
| Grizzled Skipper | 23 | . | . | . | 5 | 3 | 4 | 4 | 7 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | 18 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 7 | 6 | 2 | |||||||
| Brimstone | 109 | 12 | 5 | 15 | 13 | 9 | 10 | 11 | 10 | . | 2 | . | . | . | 2 | . | 10 | . | . | 1 | |||||||
| Large White | 72 | . | . | . | . | . | . | . | . | . | 1 | . | . | 6 | 19 | 1 | 22 | 6 | 12 | 5 | |||||||
| Small White | 3 | . | . | 1 | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | 2 | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | 74 | . | . | . | 4 | 12 | 3 | 6 | . | 1 | . | 1 | 8 | 7 | . | . | 12 | 14 | 3 | 3 | |||||||
| Small Blue | 30 | . | . | . | . | . | . | . | 4 | 1 | 3 | . | . | 2 | . | . | . | 18 | . | . | |||||||
| Brown Argus | 16 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 2 | . | 3 | 5 | 3 | 2 | |||||||
| Common Blue | 491 | . | . | . | . | . | 8 | 1 | 25 | 1 | 9 | . | . | . | 13 | . | 176 | 154 | 77 | 23 | |||||||
| Chalk-hill Blue | 220 | . | . | . | . | . | . | . | . | . | . | . | . | 28 | 86 | 18 | . | 64 | 24 | . | |||||||
| Adonis Blue | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 4 | |||||||
| Holly Blue | 9 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | 2 | . | 5 | . | . | . | |||||||
| Red Admiral | 28 | . | . | 1 | 1 | . | 1 | . | . | . | 2 | . | 1 | 1 | 1 | 1 | 5 | 4 | 7 | 2 | |||||||
| Painted Lady | 76 | . | . | . | . | . | . | 2 | 17 | 6 | 3 | 1 | 4 | 2 | 1 | 6 | 11 | 8 | 13 | . | |||||||
| Small Tortoiseshell | 63 | 4 | 9 | 1 | . | . | . | 1 | . | . | 3 | 6 | 7 | 8 | 8 | . | 1 | . | 2 | 3 | |||||||
| Peacock | 22 | 4 | 3 | 1 | 1 | . | . | 1 | 1 | . | 1 | . | . | . | 5 | 1 | . | . | . | . | |||||||
| Comma | 3 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | |||||||
| Dark Green Fritillary | 16 | . | . | . | . | . | . | . | . | . | . | 2 | 9 | 3 | 1 | . | . | . | . | . | |||||||
| Speckled Wood | 22 | . | 1 | 6 | 1 | . | . | . | . | . | . | . | . | . | . | . | 7 | 1 | 2 | 4 | |||||||
| Wall Brown | 17 | . | . | . | . | . | . | . | 5 | 1 | 2 | . | . | . | . | . | 1 | 5 | 2 | . | |||||||
| Marbled White | 137 | . | . | . | . | . | . | . | . | . | . | 8 | 47 | 57 | 20 | . | 1 | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 343 | . | . | . | . | . | . | . | . | . | . | . | 1 | 70 | 136 | 9 | 75 | 40 | 10 | 2 | |||||||
| Meadow Brown | 721 | . | . | . | . | . | . | . | . | 2 | . | 19 | 143 | 166 | 44 | 80 | 91 | 69 | 61 | 36 | |||||||
| Small Heath | 952 | . | . | . | 4 | 13 | 9 | 17 | 67 | 62 | 54 | 54 | 54 | 22 | 22 | 1 | 26 | 159 | 155 | 179 | |||||||
| Ringlet | 13 | . | . | . | . | . | . | . | . | . | . | 2 | 5 | 5 | . | . | . | . | . | . | |||||||