
| 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 Skipper | 92 | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 14 | 28 | 17 | 13 | 9 | 4 | 1 | . | . | . | |||
| Large Skipper | 52 | . | . | . | . | . | . | . | . | . | 3 | 8 | 14 | 12 | 5 | 1 | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | 2 | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | 24 | . | . | . | 2 | 4 | 5 | 1 | 5 | 6 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 12 | 3 | 2 | 1 | . | . | 0.5 | . | 1 | . | . | . | . | . | . | 1 | . | . | 1 | 2 | . | . | . | . | |||
| Large White | 32 | . | . | . | . | 2 | 2.5 | 5 | 4 | . | 1 | 1 | 1.5 | 2 | . | 1 | 2 | 2 | 3 | 3 | 1 | 1 | . | . | |||
| Small White | 49 | . | . | 2 | 1 | 1 | 1.5 | 3 | . | . | 2 | 1 | 1 | 1 | 3 | 2 | 6 | 1 | 4 | 5 | 7 | 5 | 1 | . | |||
| Green-veined White | 65 | . | . | . | . | 7 | 4.5 | 6 | 4 | 2 | 1 | 1 | . | . | 3 | 5 | 5 | 7 | 8 | 3 | 5 | 1 | 1 | . | |||
| Orange Tip | 10 | . | 1 | 1 | 1 | 1 | 1.5 | 2 | 1 | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 2 | 1 | . | . | . | . | . | |||
| Small Copper | 15 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 8 | 2 | 2 | 1 | 1 | |||
| Common Blue | 24 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 8 | 6 | 4 | 2 | . | |||
| Duke of Burgundy Fritillary | 23 | . | . | . | . | . | 3 | 6 | 8 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| White Admiral | 18 | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 6 | 2 | 2 | . | . | . | . | . | . | . | |||
| Red Admiral | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | 1 | . | . | 1 | . | . | |||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||
| Small Tortoiseshell | 51 | 1 | . | . | 1 | . | . | . | . | . | . | . | 1 | 7 | 5 | 3 | 1 | 1 | . | 4 | 5 | 10 | 6 | . | |||
| Peacock | 121 | 3 | 11 | 7 | 1 | 6 | 0.5 | 1 | . | 1 | . | . | . | . | . | 3 | 28 | 35 | 18 | 5 | 1 | . | . | . | |||
| Comma | 51 | 1 | 2 | 1.5 | . | . | . | . | . | . | . | . | . | 2 | 4 | 5 | 7 | 10 | 5 | 1 | . | . | 3 | 7 | |||
| Small Pearl-bordered Fritillary | 29 | . | . | . | . | . | . | . | . | 6 | 8 | 5 | 4 | 4 | . | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | 67 | . | . | . | . | 1 | 8.5 | 17 | 16 | 15 | 9 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| High Brown Fritillary | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||
| Dark Green Fritillary | 7 | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | . | . | . | 1 | . | . | . | . | . | |||
| Silver-washed Fritillary | 91 | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 16 | 18 | 15 | 14 | 10 | 4 | . | . | . | . | |||
| Speckled Wood | 86 | . | . | 0.5 | 1 | . | . | 2 | 3 | 2 | 3 | 3 | 1.5 | 4 | . | 2 | . | 2 | 5 | 4 | 12 | 14 | 11 | 14 | |||
| Marbled White | 24 | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 8 | 5 | 2 | . | . | . | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 125 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 11 | 18 | 19 | 26 | 21 | 18 | 8 | 2 | . | |||
| Meadow Brown | 76 | . | . | . | . | . | . | . | . | . | . | . | 1.5 | 16 | 13 | 7 | 10 | 9 | 3 | 2 | . | . | . | . | |||
| Ringlet | 201 | . | . | . | . | . | . | . | . | . | . | . | 12 | 39 | 58 | 26 | 6 | 6 | 4 | 1 | . | . | . | . | |||