
| 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 | 123 | . | . | . | . | . | . | . | . | . | 7 | 32 | . | . | . | . | . | . | . | ||||||||
| Small Skipper | 79 | . | . | . | . | . | . | . | . | . | . | . | 43 | 30 | 2 | 1 | . | . | . | ||||||||
| Large Skipper | 26 | . | . | . | . | . | . | 1 | 5 | 5 | 8 | 3 | 3 | . | . | . | . | . | . | ||||||||
| Clouded Yellow | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Brimstone | 138 | 7 | 4 | 10 | 15 | 2 | 8 | 11 | 6 | 9 | 4 | 14 | 4 | 7 | 2 | 1 | . | 1 | 1 | ||||||||
| Large White | 71 | . | . | 1 | 2 | 1 | 6 | 5 | 5 | 2 | 1 | 3 | 7 | 12 | 13 | 2 | 1 | . | 1 | ||||||||
| Small White | 203 | . | 1 | . | 2 | . | 4 | . | 2 | . | . | . | 9 | 33 | 20 | 28 | 21 | 24 | 18 | ||||||||
| Green-veined White | 44 | . | . | . | . | . | 2 | 2 | . | . | . | . | 5 | 1 | 5 | 11 | 2 | 1 | 3 | ||||||||
| Orange Tip | NI | . | . | . | 1 | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | 16 | . | . | . | . | . | 1 | . | 1 | 1 | . | . | . | 5 | 2 | 3 | 1 | 1 | . | ||||||||
| Brown Argus | 193 | . | . | . | . | . | . | 1 | 9 | 8 | 7 | . | . | 23 | 16 | 30 | 24 | 21 | 17 | ||||||||
| Common Blue | 324 | . | . | . | . | 1 | 8 | 18 | 18 | 17 | 8 | 1 | 2 | 23 | 34 | 44 | 47 | 28 | 21 | ||||||||
| Chalk-hill Blue | 212 | . | . | . | . | . | . | . | . | . | . | . | 9 | 47 | 55 | 31 | 13 | 18 | 8 | ||||||||
| Holly Blue | 15 | . | . | . | 2 | 1 | 1 | . | 1 | . | . | . | . | . | . | 5 | . | . | . | ||||||||
| Red Admiral | 2 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | ||||||||
| Painted Lady | 13 | . | . | . | . | . | . | . | . | 2 | . | . | 1 | 1 | 6 | 1 | . | . | . | ||||||||
| Peacock | 6 | . | 1 | 1 | . | . | 1 | . | 1 | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Comma | 29 | . | 8 | 2 | 1 | . | 1 | 1 | . | . | 2 | 1 | . | 1 | 2 | . | . | . | . | ||||||||
| Silver-washed Fritillary | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Speckled Wood | 45 | . | . | 2 | . | 2 | 1 | 2 | 3 | 4 | 3 | 3 | . | 2 | 3 | 5 | 2 | 3 | 2 | ||||||||
| Marbled White | 182 | . | . | . | . | . | . | . | . | 2 | 47 | 73 | 32 | 11 | 3 | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | 320 | . | . | . | . | . | . | . | . | . | . | 2 | 75 | 105 | 87 | 19 | 3 | . | . | ||||||||
| Meadow Brown | 882 | . | . | . | . | . | . | . | 10 | 69 | 183 | 139 | 185 | 68 | 79 | 38 | 13 | 9 | 6 | ||||||||
| Small Heath | 281 | . | . | . | . | 6 | 9 | 25 | 36 | 28 | 25 | 17 | 2 | 1 | 5 | 10 | 17 | 17 | 27 | ||||||||
| Ringlet | 72 | . | . | . | . | . | . | . | . | 2 | 16 | 37 | 6 | 4 | 1 | . | . | . | . | ||||||||