
| 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 | . | . | . | . | . | . | 7 | 9 | 18 | 4 | 8 | 1 | . | . | . | . | . | |||||||||
| Silver-spotted Skipper | 19 | . | . | . | . | . | . | . | . | . | . | 1 | 10 | 2 | . | . | . | . | |||||||||
| Large Skipper | 50 | . | . | . | . | 7 | 22 | . | . | 2 | . | 1 | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | NI | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Clouded Yellow | 5 | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | |||||||||
| Brimstone | 56 | 2 | 4 | . | 2 | 1 | . | 1 | 1 | 3 | 3 | 3 | 11 | 2 | . | 2 | . | 2 | |||||||||
| Large White | 32 | . | 1 | . | . | . | 3 | 1 | 1 | 18 | 2 | . | 2 | . | . | . | 1 | 1 | |||||||||
| Small White | 41 | . | . | 1 | 2 | 1 | . | . | . | . | 5 | 4 | 3 | 2 | 6 | 8 | 5 | 2 | |||||||||
| Green-veined White | 16 | . | . | 1 | 2 | . | . | . | . | 3 | . | 5 | . | 2 | . | . | . | . | |||||||||
| Green Hairstreak | NI | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brown Hairstreak | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Small Copper | NI | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | . | . | . | |||||||||
| Brown Argus | NI | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 3 | . | . | . | . | |||||||||
| Common Blue | 54 | . | . | 5 | . | . | 2 | . | . | . | . | . | 18 | 6 | 7 | 2 | 1 | . | |||||||||
| Chalk-hill Blue | 46 | . | . | . | . | . | . | . | . | 6 | 8 | 13 | 13 | . | . | . | . | . | |||||||||
| Holly Blue | NI | . | . | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Red Admiral | 2 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||||
| Small Tortoiseshell | 9 | . | . | . | . | . | 2 | . | . | . | . | . | 2 | 2 | . | . | . | . | |||||||||
| Peacock | 18 | . | . | . | 3 | . | . | . | . | . | 1 | 3 | 4 | 1 | . | . | . | . | |||||||||
| Comma | 8 | . | . | . | . | . | . | . | . | . | 3 | 1 | . | . | 3 | 1 | . | . | |||||||||
| Silver-washed Fritillary | NI | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | |||||||||
| Speckled Wood | 9 | 1 | . | . | . | 1 | . | . | . | . | . | . | 2 | . | . | 1 | 3 | . | |||||||||
| Marbled White | 41 | . | . | . | . | . | . | 9 | 13 | 7 | 5 | 3 | . | . | . | . | . | . | |||||||||
| Gatekeeper / Hedge Brown | 138 | . | . | . | . | . | . | . | 1 | 33 | 20 | 31 | 32 | 3 | . | . | . | . | |||||||||
| Meadow Brown | 276 | . | . | . | . | 7 | 21 | 9 | 13 | 27 | 28 | 26 | 21 | 33 | 24 | 15 | 3 | 6 | |||||||||
| Small Heath | 12 | . | . | . | . | . | . | . | . | . | 6 | . | 3 | 1 | . | . | . | . | |||||||||
| Ringlet | 85 | . | . | . | . | 1 | 19 | 13 | 17 | 15 | 2 | 2 | . | . | . | . | . | . | |||||||||