
| 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 | . | . | . | . | . | . | . | . | 12 | 1 | 30 | 25 | 12 | 3 | 3 | 1 | . | . | . | |||||||
| Large Skipper | . | . | . | . | 4 | 30 | 12 | 5 | 2 | . | . | . | . | . | . | . | . | . | . | |||||||
| Dingy Skipper | . | . | . | 1 | 1 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | . | 1 | 1 | 3 | 9 | 11 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||
| Brimstone | . | 10 | 5 | 13 | 2 | 4 | . | 5 | . | . | . | . | 7 | 6 | 17 | 5 | . | 5 | . | |||||||
| Large White | . | . | 1 | 2 | 2 | 9 | 4 | . | . | . | 1 | 4 | 15 | 26 | 22 | 24 | 2 | 1 | . | |||||||
| Small White | . | 1 | 1 | . | 1 | 3 | . | 1 | 1 | . | 3 | 2 | 7 | 18 | 35 | 15 | 5 | 4 | . | |||||||
| Green-veined White | . | . | 3 | 1 | . | 3 | . | . | . | . | . | . | 5 | . | 1 | . | . | . | . | |||||||
| Orange Tip | . | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | 2 | 1 | . | . | . | |||||||
| Small Copper | . | . | . | . | 3 | 7 | . | . | . | . | . | . | 3 | 2 | 3 | 10 | 1 | . | 2 | |||||||
| Common Blue | . | . | . | . | 2 | 3 | . | 2 | . | . | . | . | . | . | 3 | 14 | . | 1 | . | |||||||
| Holly Blue | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Red Admiral | . | . | . | . | . | . | . | 1 | . | . | . | 8 | 1 | 4 | . | 3 | 2 | 1 | 5 | |||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 2 | 2 | 8 | 6 | |||||||
| Small Tortoiseshell | . | . | . | . | . | . | 1 | . | 1 | . | 1 | . | . | . | . | . | 13 | 11 | 27 | |||||||
| Peacock | 2 | 9 | 2 | . | . | 1 | . | . | . | . | 3 | 1 | 50 | 9 | 9 | 2 | 1 | 3 | . | |||||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||||||
| Small Pearl-bordered Fritillary | . | . | . | 2 | 4 | 7 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | 1 | . | 1 | 12 | 16 | 30 | 24 | 13 | 4 | . | . | . | |||||||
| Marsh Fritillary | . | . | 2 | 48 | 103 | 46 | 8 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Speckled Wood | . | 1 | 2 | 3 | 10 | 11 | 9 | . | 2 | . | . | 2 | 3 | . | . | 12 | 28 | 22 | . | |||||||
| Marbled White | . | . | . | . | . | . | . | 2 | 37 | 19 | 71 | 35 | 8 | 4 | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 19 | 78 | 194 | 276 | 134 | 158 | 45 | 6 | . | . | |||||||
| Meadow Brown | . | . | . | . | . | 7 | 13 | 203 | 323 | 100 | 254 | 135 | 100 | 63 | 28 | 6 | 1 | . | . | |||||||
| Small Heath | . | . | . | . | 4 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Ringlet | . | . | . | . | . | . | . | 4 | 54 | 92 | 74 | 54 | 17 | 6 | . | . | . | . | . | |||||||