
| 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 | ||||||||||||||||||||||||||
| Large Skipper | 17 | . | . | . | . | . | . | 1 | 1 | 3 | 3 | 3 | 2 | 2 | 2 | . | . | . | . | . | . | . | |||||
| Dingy Skipper | 14 | . | . | . | . | 1 | 6 | 4 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | |||||
| Brimstone | 84 | 5 | 7 | 5 | 5 | 5 | 1 | 1 | . | . | . | . | . | . | . | 1 | . | 3 | 4 | 15 | 5 | 6 | |||||
| Large White | 46 | . | . | . | . | . | . | . | 3 | 2 | . | . | 2 | . | . | 2 | 3 | 3 | 12 | 10 | 7 | 1 | |||||
| Small White | 26 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 5 | 5 | 4 | 6 | . | 2 | |||||
| Green-veined White | 661 | . | 3 | 23 | 49 | 61 | 38 | 38 | 39 | 18 | 2 | 5 | 8 | 36 | 64 | 70 | 94 | 52 | 23 | 13 | 5 | 3 | |||||
| Orange Tip | 82 | . | 8 | 17 | 19 | 12 | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | 3 | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | |||||
| Small Copper | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | |||||
| Northern Brown Argus | 81 | . | . | . | . | . | . | . | 3 | 9 | 26 | 9 | 9 | 9 | 14 | 2 | . | . | . | . | . | . | |||||
| Common Blue | 25 | . | . | . | . | . | . | . | 2 | . | 4 | 12 | 2 | 1 | 3 | . | . | 1 | . | . | . | . | |||||
| Holly Blue | NI | . | 1 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||||
| Red Admiral | 64 | . | . | . | . | . | . | 1 | 1 | . | . | . | 1 | 3 | 1 | 1 | 5 | 11 | 6 | 12 | 14 | 5 | |||||
| Painted Lady | 329 | . | . | . | . | . | 4 | 13 | 3 | 1 | 2 | 2 | 2 | 1 | . | 78 | 108 | 65 | 27 | 11 | 7 | 3 | |||||
| Small Tortoiseshell | 251 | 6 | 5 | 9 | 17 | 5 | 3 | 1 | 2 | 1 | 1 | . | . | 26 | 44 | 59 | 37 | 8 | 4 | 3 | 2 | . | |||||
| Peacock | 449 | 7 | 22 | 35 | 28 | 11 | 20 | 6 | 9 | 1 | 2 | . | . | . | 1 | 24 | 66 | 68 | 39 | 32 | 12 | 5 | |||||
| Comma | 21 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 1 | 3 | 4 | 6 | |||||
| Small Pearl-bordered Fritillary | 72 | . | . | . | . | . | . | 5 | 17 | 18 | 18 | 11 | 2 | . | 1 | . | . | . | . | . | . | . | |||||
| Pearl-bordered Fritillary | 33 | . | . | . | 2 | 3 | 12 | 6 | 7 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| High Brown Fritillary | 115 | . | . | . | . | . | . | . | . | . | 4 | 12 | 23 | 34 | 22 | 10 | 6 | 3 | 1 | . | . | . | |||||
| Speckled Wood | 3 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | 1 | . | . | |||||
| Wall Brown | 25 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 5 | 11 | 4 | 2 | 1 | |||||
| Grayling | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Meadow Brown | 536 | . | . | . | . | . | . | . | . | 2 | 46 | 72 | 73 | 88 | 126 | 71 | 33 | 23 | 2 | . | . | . | |||||
| Small Heath | 91 | . | . | . | . | 10 | 10 | 26 | 26 | 14 | 5 | . | . | . | . | . | . | . | . | . | . | . | |||||