
| 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 | . | . | . | . | . | . | . | 3 | 3 | . | . | . | . | . | . | . | . | . | |||||||||
| Large Skipper | . | . | . | . | . | . | . | 1 | 11 | . | . | . | . | . | . | . | . | . | |||||||||
| Clouded Yellow | 2 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brimstone | 68 | . | 15 | 2 | 5 | . | . | . | . | 1 | 5 | 2 | . | . | . | . | . | . | |||||||||
| Large White | 46 | . | 1 | . | 5 | . | . | . | . | 15 | 10 | 26 | 24 | 6 | . | . | . | 3 | |||||||||
| Small White | 149 | . | 5 | 9 | 12 | . | . | 2 | 4 | 16 | 2 | 9 | 20 | 13 | 3 | 8 | 2 | 1 | |||||||||
| Green-veined White | 46 | . | . | . | 4 | 2 | . | . | . | 1 | 13 | . | . | 6 | . | 3 | . | . | |||||||||
| Orange Tip | 70 | . | 19 | 2 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brown Hairstreak | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||||
| Small Copper | 6 | . | . | . | . | . | 3 | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Common Blue | 78 | . | . | 3 | . | 7 | 5 | 6 | 2 | . | 2 | . | 59 | 39 | 5 | . | . | . | |||||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Holly Blue | NI | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Red Admiral | NI | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||||||
| Painted Lady | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | |||||||||
| Small Tortoiseshell | 12 | . | 1 | . | 2 | . | . | 2 | 3 | . | . | . | 3 | 4 | 1 | . | . | . | |||||||||
| Peacock | 18 | . | 4 | 2 | . | . | . | . | . | 5 | 1 | . | 1 | . | . | . | . | . | |||||||||
| Comma | 19 | . | . | . | . | . | . | 2 | 3 | . | 1 | . | . | . | . | 4 | . | . | |||||||||
| Silver-washed Fritillary | 1 | . | . | . | . | . | . | . | . | . | 3 | . | 5 | . | . | . | . | . | |||||||||
| Speckled Wood | 179 | . | 9 | 1 | 8 | 7 | 7 | 9 | . | . | 5 | . | 19 | 36 | 10 | 8 | 3 | 4 | |||||||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Marbled White | . | . | . | . | . | . | . | 14 | 33 | 16 | 7 | 1 | . | . | . | . | . | . | |||||||||
| Gatekeeper / Hedge Brown | 18 | . | . | . | . | . | . | . | . | 17 | 84 | 44 | 85 | 9 | . | . | . | . | |||||||||
| Meadow Brown | 222 | . | . | . | . | 14 | 48 | 132 | 166 | 40 | 80 | 21 | 131 | 117 | 12 | 3 | . | 1 | |||||||||
| Small Heath | . | . | . | . | . | . | . | . | 2 | . | . | . | 1 | 8 | 1 | . | . | . | |||||||||
| Ringlet | . | . | . | . | . | . | . | . | 15 | 3 | 10 | . | . | 1 | . | . | . | . | |||||||||