
| 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/Essex Skipper | NI | . | . | . | . | . | . | . | . | 3 | 10 | 42 | 29 | 23 | 17 | 12 | 2 | . | . | . | . | . | |||||
| Silver-spotted Skipper | 10 | . | . | . | . | . | . | . | . | . | . | . | . | . | 10 | . | . | . | . | . | . | . | |||||
| Large Skipper | 30 | . | . | . | . | . | . | . | 5 | 16 | 5 | 3 | 1 | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | 7 | . | . | . | 7 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | 4 | . | . | . | 1 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 50 | 2 | 1 | 13 | 4 | 3 | 1 | 2 | 1 | . | 2 | 2 | 4 | 2 | 1 | 4 | 2 | 2 | . | . | 1 | 1 | |||||
| Large White | 9 | . | . | . | . | . | . | . | . | . | . | 2 | . | 3 | 2 | . | 1 | . | . | . | . | . | |||||
| Small White | 36 | . | . | . | . | . | . | . | . | . | . | . | 8 | 4 | 7 | 7 | 2 | 3 | 1 | 4 | 1 | . | |||||
| Orange Tip | 2 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | 5 | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | 8 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | 1 | 2 | 2 | |||||
| Brown Argus | 8 | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | 1 | 2 | 1 | . | . | . | 1 | . | |||||
| Common Blue | 105 | . | . | . | . | . | 5 | 9 | 3 | 2 | . | . | . | 4 | 11 | 15 | 20 | 18 | 8 | 6 | 1 | . | |||||
| Chalk-hill Blue | 81 | . | . | . | . | . | . | . | . | . | 2 | 5 | 20 | 23 | 3 | 16 | 5 | 6 | 1 | . | . | . | |||||
| Holly Blue | 2 | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||
| Duke of Burgundy Fritillary | 2 | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | 2 | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Small Tortoiseshell | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||||
| Peacock | 23 | 1 | 3 | . | 3 | . | . | . | . | . | . | . | 1 | 12 | 1 | 2 | . | . | . | . | . | . | |||||
| Comma | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | |||||
| Silver-washed Fritillary | 7 | . | . | . | . | . | . | . | . | . | 2 | . | 1 | 4 | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | 15 | . | 1 | . | 1 | . | 1 | . | 1 | . | . | . | . | . | 1 | . | 2 | 3 | 2 | 4 | . | . | |||||
| Marbled White | 54 | . | . | . | . | . | . | . | . | . | 18 | 19 | 14 | 1 | 2 | . | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 169 | . | . | . | . | . | . | . | . | . | 2 | 13 | 28 | 68 | 21 | 30 | 6 | 2 | . | . | . | . | |||||
| Meadow Brown | 375 | . | . | . | . | . | . | . | 1 | 4 | 15 | 41 | 34 | 67 | 50 | 68 | 31 | 34 | 21 | 8 | . | . | |||||
| Small Heath | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | . | . | . | 1 | 2 | 1 | . | |||||
| Ringlet | 92 | . | . | . | . | . | . | . | 3 | 40 | 27 | 15 | 3 | 3 | 1 | . | . | . | . | . | . | . | |||||