
| 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 | 109 | . | . | . | . | . | . | . | . | 14 | 8 | 34 | 24 | 7 | . | 1 | . | . | . | . | . | ||||||
| Essex Skipper | 12 | . | . | . | . | . | . | . | . | . | 1 | 4 | 3 | 2 | . | . | . | . | . | . | . | ||||||
| Large Skipper | 61 | . | . | . | . | . | . | 10 | 12 | 17 | 4 | 2 | 4 | . | . | . | . | . | . | . | . | ||||||
| Dingy Skipper | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | 12 | . | . | . | 2 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | 15 | . | . | . | . | . | . | 1 | . | . | . | . | . | 2 | 1 | 4 | 5 | 1 | 1 | . | . | ||||||
| Brimstone | 108 | 19 | 16 | 8 | 10 | 8 | 2 | . | . | . | . | 6 | 2 | 4 | 6 | 2 | 2 | . | 2 | 1 | 1 | ||||||
| Large White | 91 | . | . | 1 | 1 | . | 5 | . | 2 | 2 | . | 11 | 10 | 15 | 14 | 7 | 6 | 4 | 1 | 1 | . | ||||||
| Small White | 4 | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | . | 1 | 1 | . | . | . | ||||||
| Green-veined White | 80 | . | 4 | 7 | 12 | 2 | 4 | . | 1 | . | . | 2 | 1 | 5 | 9 | 3 | 8 | 3 | 2 | . | 1 | ||||||
| Orange Tip | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | 18 | . | . | . | . | . | 6 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | 75 | 3 | 2 | 3 | 5 | 5 | 2 | . | . | . | . | 5 | 4 | 2 | 3 | 1 | 2 | 4 | 5 | 8 | 11 | ||||||
| Silver-studded Blue | 278 | . | . | . | . | 3 | 28 | 24 | 21 | 25 | 12 | 11 | 22 | 10 | 16 | 7 | 8 | 7 | 6 | 1 | . | ||||||
| Brown Argus | 63 | . | . | . | 2 | 3 | 5 | . | 2 | 2 | 1 | 1 | 3 | 5 | 4 | 11 | 6 | 6 | 2 | . | 1 | ||||||
| Common Blue | 220 | . | . | . | . | 6 | 28 | 4 | 3 | 1 | . | 2 | 7 | 35 | 35 | 20 | 10 | 14 | 3 | 1 | 1 | ||||||
| Holly Blue | 17 | . | . | . | 1 | . | 1 | 1 | . | 1 | . | 3 | 1 | 1 | 3 | 2 | . | . | . | . | . | ||||||
| Red Admiral | 16 | . | . | . | . | . | . | . | 1 | 2 | . | . | 1 | . | 2 | 1 | 4 | 1 | 1 | 3 | . | ||||||
| Painted Lady | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | ||||||
| Small Tortoiseshell | 38 | 1 | 1 | . | . | . | . | . | 1 | 2 | . | . | . | 2 | 10 | 11 | 4 | 1 | 3 | 2 | . | ||||||
| Peacock | 93 | 34 | 15 | 4 | 2 | . | . | . | 2 | . | . | 6 | 5 | 1 | 3 | . | 1 | 1 | 1 | 1 | . | ||||||
| Comma | 6 | 2 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 3 | . | ||||||
| Silver-washed Fritillary | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||
| Speckled Wood | 41 | . | 4 | 3 | 1 | 3 | 1 | . | . | . | . | 2 | 4 | 5 | 4 | 3 | 1 | 1 | 2 | 1 | . | ||||||
| Marbled White | 6 | . | . | . | . | . | . | . | 1 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | ||||||
| Grayling | 1014 | . | . | . | . | . | . | . | . | 1 | 2 | 154 | 142 | 179 | 166 | 125 | 84 | 50 | 27 | 6 | . | ||||||
| Gatekeeper / Hedge Brown | 885 | . | . | . | . | . | . | . | . | . | . | 160 | 162 | 177 | 158 | 86 | 46 | 15 | . | 1 | . | ||||||
| Meadow Brown | 907 | . | . | . | . | . | . | 12 | 24 | 50 | 41 | 149 | 109 | 116 | 127 | 97 | 40 | 20 | 11 | 4 | . | ||||||
| Small Heath | 653 | . | . | . | . | 1 | 4 | 35 | 49 | 90 | 74 | 95 | 109 | 25 | 19 | 5 | 5 | 3 | 2 | 8 | 1 | ||||||
| Ringlet | 4 | . | . | . | . | . | . | . | 1 | 3 | . | . | . | . | . | . | . | . | . | . | . | ||||||