
| 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 | 181 | . | . | . | . | . | . | . | . | . | 5 | 2 | 52 | 50 | 35 | 7 | 2 | 1 | . | . | |||||||
| Essex Skipper | 19 | . | . | . | . | . | . | . | . | . | . | . | 3 | 7 | 6 | 1 | . | . | . | . | |||||||
| Large Skipper | 136 | . | . | . | . | . | . | . | . | 5 | 26 | 26 | 21 | 9 | 2 | . | . | . | . | . | |||||||
| Clouded Yellow | 25 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 2 | 13 | 3 | 3 | . | |||||||
| Brimstone | 194 | 7 | . | 17 | 17 | 10 | 17 | 4 | 2 | . | . | . | 5 | 9 | 33 | 13 | 14 | 9 | 2 | 1 | |||||||
| Large White | 125 | . | . | . | 2 | 4 | 2 | . | 2 | . | . | 6 | 15 | 18 | 17 | 22 | 18 | 7 | . | . | |||||||
| Small White | 12 | . | . | . | . | . | 1 | . | . | 1 | . | . | 2 | . | 1 | 3 | 1 | 1 | . | . | |||||||
| Green-veined White | 239 | . | . | 1 | 13 | 16 | 11 | 2 | 3 | . | . | 2 | 13 | 34 | 42 | 48 | 26 | 19 | 1 | . | |||||||
| Orange Tip | 47 | . | . | 5 | 13 | 10 | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | 3 | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | 22 | . | . | . | . | . | . | . | . | . | . | . | 2 | 7 | 6 | 4 | 1 | 1 | . | . | |||||||
| Small Copper | 10 | . | . | . | 1 | 1 | . | . | . | . | . | . | 1 | 2 | 1 | . | . | 2 | . | . | |||||||
| Common Blue | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | |||||||
| Holly Blue | 2 | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Red Admiral | 22 | . | . | . | . | . | . | 1 | . | 1 | . | 7 | 1 | 2 | 1 | . | . | . | 2 | 1 | |||||||
| Painted Lady | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 2 | . | . | |||||||
| Small Tortoiseshell | 35 | 1 | 2 | . | 3 | . | . | . | . | . | 1 | 4 | 8 | 1 | 1 | . | 2 | 1 | . | 1 | |||||||
| Peacock | 134 | 2 | 1 | 9 | 10 | 4 | 6 | 4 | 3 | . | 1 | . | . | 30 | 23 | 7 | 1 | 2 | 1 | 3 | |||||||
| Comma | 37 | . | . | 1 | . | . | . | . | . | . | . | 1 | 3 | 9 | 11 | 4 | 1 | 1 | 1 | . | |||||||
| Silver-washed Fritillary | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||||
| Speckled Wood | 30 | . | . | . | 1 | . | . | 2 | 1 | . | . | . | . | 1 | 9 | 2 | 4 | 4 | 1 | . | |||||||
| Marbled White | 170 | . | . | . | . | . | . | . | . | . | 20 | 43 | 42 | 16 | 6 | . | . | . | . | . | |||||||
| Grayling | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 263 | . | . | . | . | . | . | . | . | . | . | . | 17 | 71 | 91 | 41 | 29 | 5 | . | . | |||||||
| Meadow Brown | 490 | . | . | . | . | . | . | . | . | 5 | 48 | 77 | 90 | 89 | 65 | 15 | 8 | 10 | . | . | |||||||
| Small Heath | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Ringlet | 6 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | . | . | . | . | . | . | |||||||
| Five-spot Burnet | NI | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||||
| Scarlet Tiger | NI | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||||
| Silver Y | NI | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||||