
| 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 | 108 | . | . | . | . | . | 1 | . | . | 5 | 17 | 40 | 14 | 16 | 4 | . | . | . | . | . | |||||||
| Essex Skipper | 11 | . | . | . | . | . | . | . | . | . | . | 5 | 2 | 4 | . | . | . | . | . | . | |||||||
| Large Skipper | 57 | . | . | . | . | . | . | . | 4 | 8 | 10 | 17 | 4 | 4 | 1 | . | . | . | . | . | |||||||
| Grizzled Skipper | 4 | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | 69 | . | . | . | . | . | . | 1 | . | 3 | 1 | . | . | . | 1 | 6 | 5 | 16 | 14 | 1 | |||||||
| Brimstone | 113 | 10 | 9 | 14 | 10 | 3 | 1 | . | . | . | . | . | 1 | 5 | 8 | 7 | 6 | 2 | 8 | 2 | |||||||
| Large White | 77 | . | . | . | 2 | 1 | . | . | . | 2 | 2 | 3 | 9 | 10 | 17 | 11 | 4 | . | 6 | . | |||||||
| Small White | 6 | . | . | 1 | . | 1 | . | . | . | . | . | . | . | 2 | 1 | . | . | . | 1 | . | |||||||
| Green-veined White | 76 | . | . | 2 | 5 | 4 | . | . | . | 2 | 1 | 3 | 4 | 6 | 12 | 7 | 6 | . | 5 | . | |||||||
| Orange Tip | 9 | . | . | . | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | 33 | . | . | . | 9 | 4 | 5 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | 114 | . | . | . | 15 | . | 1 | 2 | . | 2 | 8 | 7 | 6 | 7 | 8 | . | 7 | 2 | 5 | 13 | |||||||
| Silver-studded Blue | 149 | . | . | . | . | 14 | 9 | 14 | 17 | 10 | 8 | 7 | 13 | 12 | 19 | 10 | 3 | . | . | . | |||||||
| Brown Argus | 145 | . | . | . | 11 | 19 | 1 | 1 | 1 | 2 | . | 2 | 3 | 3 | 11 | 10 | 12 | 13 | 8 | 2 | |||||||
| Common Blue | 452 | . | . | . | . | 127 | 30 | 11 | 5 | . | 1 | 2 | 21 | 33 | 40 | 24 | 33 | 30 | 9 | . | |||||||
| Holly Blue | 8 | . | . | . | . | 1 | . | . | . | . | . | 2 | 1 | . | 1 | 1 | 1 | 1 | . | . | |||||||
| Red Admiral | 36 | . | . | . | . | . | . | . | . | 1 | 4 | 1 | 1 | . | . | 2 | . | 1 | 12 | . | |||||||
| Painted Lady | 6 | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | 2 | . | 2 | . | . | . | |||||||
| Small Tortoiseshell | 21 | 4 | 2 | . | . | . | . | . | . | . | 1 | 1 | . | 1 | 1 | . | . | . | 3 | 1 | |||||||
| Peacock | 103 | 11 | 7 | 14 | 2 | . | . | 1 | . | . | . | 2 | 4 | 7 | 12 | 1 | 1 | . | 5 | . | |||||||
| Comma | 8 | . | . | 1 | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | 3 | . | |||||||
| Speckled Wood | 32 | . | . | 2 | 1 | 2 | . | . | . | 1 | 1 | 1 | 3 | 1 | 2 | 5 | 2 | 2 | 1 | 1 | |||||||
| Marbled White | 7 | . | . | . | . | . | . | . | . | . | 1 | 6 | . | . | . | . | . | . | . | . | |||||||
| Grayling | 1700 | . | . | . | . | . | . | . | . | . | 19 | 115 | 232 | 253 | 338 | 222 | 262 | 110 | 42 | 1 | |||||||
| Gatekeeper / Hedge Brown | 1065 | . | . | . | . | . | . | . | . | . | 10 | 84 | 179 | 262 | 281 | 95 | 91 | 31 | 6 | . | |||||||
| Meadow Brown | 1051 | . | . | . | . | . | . | . | 16 | 27 | 78 | 153 | 149 | 158 | 170 | 79 | 81 | 35 | 17 | 1 | |||||||
| Small Heath | 339 | . | . | . | . | . | . | 2 | 9 | 46 | 72 | 73 | 38 | 25 | 12 | 1 | 1 | 1 | . | . | |||||||
| Ringlet | 2 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | |||||||