
| 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 Skipper | . | . | . | . | 1 | . | 4 | 2 | 11 | 17 | 3 | 7 | . | . | . | . | . | |||||||||
| Large Skipper | . | . | . | . | 3 | 2 | . | 5 | . | . | . | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Wood White | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | 1 | . | . | 2 | |||||||||
| Brimstone | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||||||||
| Large White | . | . | . | . | . | 1 | . | . | . | 19 | . | 3 | . | . | . | . | . | |||||||||
| Small White | . | . | . | 6 | . | . | . | 1 | 4 | 63 | 10 | 13 | 3 | 3 | . | . | . | |||||||||
| Green-veined White | . | . | 8 | 2 | 2 | 2 | 1 | 2 | 16 | 9 | 32 | 10 | 7 | . | . | . | . | |||||||||
| Orange Tip | . | . | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| White-letter Hairstreak | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Small Copper | . | . | . | 1 | . | 2 | . | . | . | 1 | . | 2 | . | . | 3 | 3 | 8 | |||||||||
| Common Blue | . | . | . | 1 | 12 | 4 | 9 | 2 | . | 8 | 3 | 32 | 6 | 1 | 1 | . | . | |||||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||||||
| Red Admiral | . | . | . | . | . | . | 1 | . | 3 | 3 | . | . | . | . | . | 2 | 1 | |||||||||
| Painted Lady | . | . | . | 1 | . | 3 | . | . | . | 7 | 1 | 2 | . | . | . | . | . | |||||||||
| Peacock | . | . | 2 | . | . | . | . | . | . | 8 | . | 2 | . | . | . | 1 | 1 | |||||||||
| Comma | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | 2 | 13 | 28 | 6 | 7 | 1 | . | . | . | . | |||||||||
| Marsh Fritillary | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Speckled Wood | . | . | 2 | 1 | 4 | 3 | 1 | 1 | . | 1 | 3 | 4 | 2 | 6 | 3 | 9 | 2 | |||||||||
| Marbled White | . | . | . | . | . | . | . | 39 | 93 | 28 | 1 | 1 | . | . | . | . | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 7 | 146 | 26 | 42 | 12 | . | . | . | . | |||||||||
| Meadow Brown | . | . | . | . | 33 | 123 | 184 | 185 | 192 | 316 | 76 | 61 | 54 | 7 | . | . | . | |||||||||
| Small Heath | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | |||||||||
| Ringlet | . | . | . | . | . | 4 | 16 | 16 | 12 | 7 | 4 | . | 3 | . | . | . | . | |||||||||