
| 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 | . | . | . | . | . | . | . | . | 1 | 2 | 1 | 1 | 4 | 21 | 16 | 4 | . | . | . | . | . | |||||
| Large Skipper | 34 | . | . | . | . | . | . | . | . | 3 | 8 | 5 | 7 | . | 2 | . | . | . | . | . | . | . | |||||
| Dingy Skipper | 27 | . | . | . | . | . | 8 | 12 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 28 | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | 2 | 2 | . | 4 | 11 | 1 | . | |||||
| Large White | 72 | . | . | . | . | 1 | . | 3 | 4 | . | 1 | . | 6 | . | 19 | 1 | 10 | 2 | 7 | 1 | 1 | . | |||||
| Small White | 33 | . | . | . | . | 1 | 2 | . | 2 | 2 | . | 1 | 1 | 1 | 4 | 6 | . | 1 | 7 | . | . | . | |||||
| Orange Tip | 2 | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | 5 | . | . | . | 1 | . | 2 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Brown Argus | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Common Blue | 41 | . | . | . | . | . | . | 3 | 3 | 5 | 4 | 1 | . | . | . | 1 | 8 | 2 | 5 | 2 | 1 | . | |||||
| Chalk-hill Blue | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 4 | . | . | . | . | . | |||||
| Painted Lady | 7 | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | 1 | 1 | . | 1 | . | . | |||||
| Small Tortoiseshell | 9 | . | . | 1 | . | 2 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 4 | |||||
| Peacock | 4 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | |||||
| Silver-washed Fritillary | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Speckled Wood | 31 | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | 1 | . | . | 1 | 7 | 4 | 9 | 1 | |||||
| Marbled White | 80 | . | . | . | . | . | . | . | . | . | 1 | 13 | 21 | 8 | 5 | 9 | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 80 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 33 | 11 | 7 | 10 | . | 1 | . | . | |||||
| Meadow Brown | 324 | . | . | . | . | . | . | . | . | . | 7 | 19 | 23 | 14 | 56 | 57 | 53 | 14 | 18 | 3 | 1 | 1 | |||||
| Small Heath | 39 | . | . | . | . | . | 2 | 10 | 8 | 2 | 2 | . | 2 | . | 2 | 1 | 1 | . | 2 | . | . | . | |||||
| Ringlet | 95 | . | . | . | . | . | . | . | . | . | 8 | 24 | 28 | 6 | . | . | . | . | . | . | . | . | |||||