
| 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 | 30 | 58 | 37 | 47 | 26 | 5 | . | . | ||||||||
| Large Skipper | 22 | . | . | . | . | . | . | . | . | 2 | 9 | 4 | 1 | . | . | . | . | . | . | ||||||||
| Dingy Skipper | 35 | . | . | . | . | . | 8 | 15 | 11 | 1 | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | 15 | . | . | . | . | . | 8 | 4 | 3 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 34 | 3 | 11 | 5 | 2 | . | . | . | . | . | . | . | . | . | 7 | 2 | . | . | . | ||||||||
| Large White | 100 | . | . | . | 1 | 1 | 6 | 8 | . | 2 | 2 | 5 | 1 | 25 | 19 | 10 | 3 | . | . | ||||||||
| Small White | 78 | . | . | . | 5 | 3 | 6 | 2 | 2 | 3 | . | . | . | 6 | 14 | 16 | 7 | 1 | 1 | ||||||||
| Green-veined White | 17 | . | . | . | . | 3 | 1 | 1 | 1 | 1 | 1 | . | . | . | 2 | 1 | 3 | . | . | ||||||||
| Orange Tip | 20 | . | . | . | 7 | 2 | 1 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | ||||||||
| Small Copper | 13 | 2 | . | . | . | . | 3 | 3 | 1 | . | . | . | . | . | 2 | 1 | 1 | . | . | ||||||||
| Brown Argus | 11 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 4 | 3 | . | 1 | . | ||||||||
| Common Blue | 92 | . | . | . | . | . | 1 | 5 | 14 | 9 | . | 1 | . | . | 8 | 16 | 20 | 2 | . | ||||||||
| Holly Blue | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| White Admiral | 20 | . | . | . | . | . | . | . | . | . | 2 | 4 | 5 | 3 | 1 | . | . | . | . | ||||||||
| Red Admiral | 16 | . | . | . | . | . | . | 1 | . | . | . | . | . | 5 | 3 | 2 | . | . | 2 | ||||||||
| Small Tortoiseshell | 22 | . | 1 | . | . | . | . | 2 | . | . | 1 | 6 | 5 | 2 | . | . | . | . | 1 | ||||||||
| Peacock | 184 | 2 | 4 | 8 | 7 | 4 | 17 | 4 | . | . | 1 | . | . | 36 | 48 | 19 | 3 | . | 2 | ||||||||
| Comma | 29 | . | 3 | . | . | . | . | 1 | . | . | . | 1 | 6 | 8 | 2 | . | . | . | 1 | ||||||||
| Silver-washed Fritillary | 6 | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 2 | . | . | . | . | ||||||||
| Speckled Wood | 117 | . | . | . | 3 | 3 | 2 | 2 | 4 | 12 | 2 | 4 | . | 6 | 11 | 2 | 2 | 18 | 10 | ||||||||
| Marbled White | 32 | . | . | . | . | . | . | . | . | . | . | 7 | 12 | 3 | 1 | . | 1 | . | . | ||||||||
| Gatekeeper / Hedge Brown | 256 | . | . | . | . | . | . | . | . | . | . | . | . | 21 | 77 | 79 | 38 | 6 | . | ||||||||
| Meadow Brown | 301 | . | . | . | . | . | . | . | . | . | 18 | 57 | 55 | 50 | 33 | 18 | 6 | . | . | ||||||||
| Small Heath | 35 | . | . | . | . | . | . | 1 | 9 | 7 | 5 | . | . | . | . | . | 4 | 1 | . | ||||||||
| Ringlet | 125 | . | . | . | . | . | . | . | . | . | 1 | 20 | 43 | 16 | 8 | 7 | . | . | . | ||||||||