
| 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 | 32 | . | . | . | . | . | . | 1 | . | . | . | 7 | 10 | 8 | 3 | . | . | . | . | . | . | . | |||||
| Small Skipper | 9 | . | . | . | . | . | . | . | 1 | 1 | 6 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Essex Skipper | 7 | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 1 | 1 | . | . | . | . | . | . | . | |||||
| Large Skipper | 46 | . | . | . | . | . | . | . | 1 | 6 | 16 | 10 | 8 | 1 | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | 15 | . | . | . | 5 | 5 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | 39 | . | . | . | . | . | 1 | . | . | . | . | . | . | 5 | 1 | 2 | 3 | 1 | 2 | 11 | 3 | 7 | |||||
| Brimstone | 67 | 1 | 2 | 3 | 6 | 8 | 4 | 1 | . | . | . | . | 1 | 6 | 4 | 6 | 2 | . | 5 | 1 | . | 2 | |||||
| Large White | 59 | . | . | 1 | 2 | 1 | 2 | 5 | 1 | 1 | . | 1 | 2 | 12 | 10 | 4 | 2 | 1 | 5 | 2 | 1 | . | |||||
| Small White | 12 | . | . | . | . | . | 1 | 2 | 1 | . | . | . | . | 3 | . | . | 1 | . | 2 | 1 | . | . | |||||
| Green-veined White | 25 | . | . | 2 | . | 1 | 1 | 1 | . | . | . | 1 | 2 | 4 | 3 | . | 3 | . | 2 | . | . | . | |||||
| Orange Tip | 9 | . | . | 2 | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | 10 | . | . | . | . | . | 2 | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | 118 | . | . | 1 | 5 | 3 | 6 | 3 | . | . | . | 2 | 7 | 5 | 4 | 4 | 4 | 8 | 12 | 15 | 20 | 13 | |||||
| Silver-studded Blue | 165 | . | . | . | . | . | 2 | 7 | 30 | 18 | 7 | 5 | 6 | 17 | 9 | 12 | 7 | 8 | 1 | 4 | 2 | 1 | |||||
| Brown Argus | 49 | . | . | . | . | . | 3 | 1 | 1 | . | . | . | . | 9 | 6 | 2 | 4 | 9 | 5 | 6 | . | . | |||||
| Common Blue | 227 | . | . | . | . | . | 50 | 79 | 16 | 2 | 2 | 1 | 2 | 9 | 1 | 12 | 6 | 1 | . | . | 1 | . | |||||
| Holly Blue | 18 | . | . | . | . | . | 1 | . | 1 | . | . | . | . | 2 | 3 | 4 | 2 | . | . | . | . | . | |||||
| Red Admiral | 20 | . | . | 1 | . | . | . | . | . | . | . | . | 4 | 2 | 2 | 2 | 1 | . | 1 | 1 | 1 | 1 | |||||
| Painted Lady | 7 | . | . | . | . | . | . | . | 1 | 2 | . | 1 | . | . | 1 | . | . | 1 | 1 | . | . | . | |||||
| Small Tortoiseshell | 7 | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | 1 | . | . | . | . | 1 | 1 | |||||
| Peacock | 27 | 2 | . | 2 | 3 | . | . | . | . | . | . | . | 1 | 5 | 3 | 2 | 1 | 1 | . | 2 | 1 | 1 | |||||
| Comma | 15 | . | . | 5 | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | . | . | . | . | . | 1 | |||||
| Silver-washed Fritillary | 2 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | |||||
| Speckled Wood | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | |||||
| Marbled White | 8 | . | . | . | . | . | . | . | . | 1 | 3 | 1 | 2 | . | . | . | . | . | . | . | . | . | |||||
| Grayling | 1352 | . | . | . | . | . | . | . | . | . | 5 | 63 | 91 | 198 | 227 | 270 | 111 | 52 | 40 | 22 | 2 | 2 | |||||
| Gatekeeper / Hedge Brown | 381 | . | . | . | . | . | . | . | . | . | 1 | 5 | 18 | 109 | 129 | 50 | 17 | 5 | 4 | . | . | . | |||||
| Meadow Brown | 269 | . | . | . | . | . | . | . | 1 | 36 | 24 | 34 | 22 | 42 | 42 | 18 | 9 | 9 | 4 | 2 | . | . | |||||
| Small Heath | 314 | . | . | . | . | . | 1 | 5 | 13 | 43 | 29 | 37 | 34 | 22 | 10 | 10 | 7 | 10 | 22 | 31 | 7 | 7 | |||||
| Ringlet | 12 | . | . | . | . | . | . | . | . | 2 | . | . | 3 | 4 | 2 | . | . | . | . | . | . | . | |||||