
| 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 | ||||||||||||||||||||||||||
| Small/Essex Skipper | . | . | . | . | 3 | . | 2 | 7 | 36 | 20 | 40 | 8 | 5 | . | . | . | . | |||||||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | 1 | 34 | 49 | 54 | 34 | 6 | 2 | . | |||||||||
| Large Skipper | . | . | . | . | . | . | . | . | 16 | 10 | 30 | 20 | 13 | 1 | . | . | . | |||||||||
| Dingy Skipper | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brimstone | 1 | 3 | 2 | 2 | . | . | . | . | 3 | 9 | 4 | 2 | 5 | 3 | 1 | 2 | . | |||||||||
| Large White | . | . | . | . | . | . | . | . | 4 | 2 | 3 | 3 | 1 | 1 | 2 | . | . | |||||||||
| Small White | . | . | . | 2 | 3 | . | . | . | 2 | 4 | 4 | 4 | 5 | . | . | 3 | 1 | |||||||||
| Green-veined White | . | . | . | 1 | . | . | . | . | . | 6 | . | 3 | 2 | . | 2 | . | 2 | |||||||||
| Orange Tip | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Green Hairstreak | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 2 | . | . | |||||||||
| Brown Argus | . | . | . | 1 | . | . | . | . | . | 4 | 7 | 5 | 27 | 16 | 1 | . | 1 | |||||||||
| Common Blue | . | . | . | 73 | 37 | 10 | 17 | . | 4 | 5 | 9 | 22 | 95 | . | 8 | 41 | 17 | |||||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | 27 | 60 | 26 | 44 | 106 | 5 | . | . | |||||||||
| Red Admiral | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | 1 | . | |||||||||
| Painted Lady | . | . | . | . | 1 | 1 | 1 | . | . | . | 3 | . | . | . | . | . | . | |||||||||
| Small Tortoiseshell | . | 1 | . | . | . | . | . | . | 2 | 3 | 3 | . | . | . | . | . | . | |||||||||
| Peacock | 2 | . | . | . | . | . | . | . | . | 2 | 1 | . | 2 | 1 | . | . | 1 | |||||||||
| Dark Green Fritillary | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | . | . | . | |||||||||
| Speckled Wood | . | 1 | . | 2 | 2 | 2 | 2 | . | . | . | . | . | . | 2 | . | 1 | 5 | |||||||||
| Marbled White | . | . | . | . | . | . | 12 | 48 | 131 | 41 | 14 | 4 | . | . | . | . | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | 1 | 3 | 5 | 23 | 33 | 66 | 23 | 29 | 43 | 10 | 4 | 3 | |||||||||
| Meadow Brown | . | . | . | . | . | 4 | 17 | 29 | 90 | 138 | 135 | 54 | 134 | 121 | 46 | 45 | 40 | |||||||||
| Small Heath | . | . | . | 20 | . | 13 | 38 | 14 | 34 | 7 | . | . | 3 | 2 | . | 20 | 12 | |||||||||
| Ringlet | . | . | . | . | . | . | 11 | 25 | 45 | 19 | . | 1 | . | . | . | . | . | |||||||||