
| 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 | . | . | . | . | . | . | . | . | . | 2 | 9 | 7 | 36 | 4 | . | . | 1 | . | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | 17 | 9 | 11 | 13 | . | 1 | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | 1 | . | . | 11 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | . | 3 | 3 | 1 | 2 | . | 1 | 2 | |||||
| Brimstone | 6 | . | . | 3 | 1 | . | . | 1 | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||
| Large White | . | . | 5 | . | 3 | 7 | . | . | . | . | 9 | 37 | 22 | 10 | 13 | 7 | 2 | 4 | 8 | 4 | 1 | |||||
| Small White | . | . | 1 | . | . | 1 | . | 5 | 4 | 3 | 3 | 5 | 11 | 66 | 2 | 19 | 25 | 1 | 5 | 2 | . | |||||
| Green-veined White | . | . | . | . | . | 2 | 2 | . | . | . | 2 | 11 | 30 | . | 1 | 3 | 8 | 2 | 4 | . | . | |||||
| Orange Tip | 1 | . | 3 | . | 4 | 3 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | . | . | 4 | 3 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | 1 | . | |||||
| Small Blue | . | . | . | . | . | 1 | 2 | 5 | 4 | 4 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brown Argus | . | . | . | . | . | 4 | 3 | . | 3 | 1 | 1 | . | . | 2 | 5 | 4 | 4 | 2 | 1 | 1 | . | |||||
| Common Blue | . | . | . | . | . | 4 | 8 | 11 | 22 | 21 | 1 | . | 9 | 46 | 52 | 93 | 92 | 16 | 10 | 6 | 2 | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 6 | 19 | 13 | 26 | 26 | 19 | 5 | 1 | . | . | |||||
| Adonis Blue | . | . | . | . | . | 10 | 24 | 4 | 1 | . | . | . | . | . | 4 | 15 | 20 | 49 | 37 | 9 | 2 | |||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | 4 | 3 | 4 | 2 | . | 1 | 1 | . | 1 | 7 | |||||
| Painted Lady | . | . | . | . | . | . | . | . | . | 2 | . | . | 1 | 5 | 1 | . | 4 | . | . | . | . | |||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | 7 | 10 | 9 | 2 | . | |||||
| Peacock | 10 | 4 | 5 | . | 3 | 2 | 2 | . | . | . | . | 4 | 8 | 14 | 1 | 2 | . | . | . | 1 | . | |||||
| Comma | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Dark Green Fritillary | . | . | . | . | . | . | . | 2 | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | |||||
| Marsh Fritillary | . | . | . | . | 2 | 18 | 6 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | . | . | 3 | 3 | . | . | 4 | 1 | . | . | 1 | 1 | 2 | 5 | 2 | 9 | 8 | 3 | 9 | 4 | 1 | |||||
| Wall Brown | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | 2 | 1 | 8 | 3 | . | . | . | . | |||||
| Marbled White | . | . | . | . | . | . | . | 5 | 19 | 42 | 48 | 28 | 15 | 2 | 1 | 1 | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 3 | 7 | 23 | . | 3 | . | . | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | 13 | 39 | 38 | 88 | 160 | 322 | 201 | 261 | 137 | 114 | 91 | 54 | 26 | 4 | |||||
| Small Heath | . | . | . | . | 5 | 5 | 10 | 21 | 16 | 29 | 21 | 6 | 6 | 4 | 1 | 2 | 6 | 9 | 10 | 5 | . | |||||
| Ringlet | . | . | . | . | . | . | . | 1 | 7 | 12 | 25 | . | 3 | 2 | . | . | . | . | . | . | . | |||||
| Unknown White | . | . | 6 | 4 | 1 | 13 | 1 | . | . | . | 15 | . | 44 | . | 16 | . | . | 8 | 5 | 8 | . | |||||
| Unknown Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 28 | 2 | 3 | . | |||||