
| 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 | . | . | . | . | . | . | . | . | . | . | 2 | 11 | 51 | 41 | 151 | 70 | 52 | 19 | 8 | . | . | . | . | |||
| Large Skipper | 86 | . | . | . | . | . | . | . | . | . | 3 | 27 | 16 | 10 | . | 16 | 7 | 3 | 1 | 1 | . | . | . | . | |||
| Dingy Skipper | 12 | . | . | . | 2 | 1 | 1 | 3 | 1 | 2 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | 40 | . | . | 2 | 5 | 1 | 3 | 6 | 13 | 2 | 1 | 2 | . | . | . | . | 1 | . | . | . | . | . | . | . | |||
| Wood White | 54 | . | . | 1 | 3 | 7 | 2 | 7 | 2 | 1 | . | . | . | . | 1 | . | 2 | 6 | 8 | 7 | 1 | . | . | . | |||
| Brimstone | 47 | . | 3 | 2 | 4 | 8 | . | 3 | 7 | 2 | . | 1 | . | . | . | . | . | 3 | 4 | 6 | 1 | . | . | . | |||
| Large White | 20 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 9 | . | 1 | . | . | 1 | 2 | |||
| Small White | 33 | . | . | 1 | . | . | . | 2 | . | . | . | . | . | . | . | 4 | . | 5 | 2 | 2 | 2 | 5 | 2 | . | |||
| Green-veined White | 17 | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | . | 1 | 1 | 3 | 2 | 1 | 1 | 1 | 1 | |||
| Orange Tip | 5 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | 6 | . | . | . | . | . | . | 1 | 1 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||
| Small Copper | 4 | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Common Blue | 66 | . | . | . | . | . | . | 2 | 4 | 3 | 3 | 2 | . | . | 1 | . | . | 5 | 11 | 14 | 7 | 4 | . | . | |||
| Holly Blue | 13 | 1 | 1 | 1 | 2 | 5 | . | . | 1 | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | |||
| White Admiral | 5 | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 1 | . | . | |||
| Small Tortoiseshell | 21 | 1 | . | 2 | . | . | . | . | . | . | . | 2 | 2 | . | 1 | . | . | . | . | 2 | . | . | . | . | |||
| Peacock | 29 | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | 4 | 8 | 7 | . | . | . | . | |||
| Comma | 17 | 2 | 2 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 4 | 6 | |||
| Small Pearl-bordered Fritillary | 4 | . | . | . | . | . | . | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | 89 | . | . | . | 6 | 16 | 13 | 35 | 12 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | 124 | . | . | . | . | . | . | . | . | . | 2 | 10 | 33 | 21 | 6 | 17 | 6 | 10 | 8 | 2 | . | . | . | . | |||
| Speckled Wood | 29 | . | 1 | . | . | . | . | . | 2 | 1 | 3 | 2 | 1 | . | . | . | . | . | . | 2 | 3 | 9 | . | . | |||
| Marbled White | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 699 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 19 | 224 | 153 | 87 | 20 | 5 | . | . | |||
| Meadow Brown | 852 | . | . | . | . | . | . | . | . | . | 1 | 18 | 31 | 92 | 91 | 109 | 106 | 199 | 46 | 18 | 14 | 3 | . | . | |||
| Small Heath | 85 | . | . | . | . | 1 | . | . | . | 1 | 1 | 15 | 2 | . | . | . | . | . | 6 | 19 | 22 | 7 | 1 | . | |||
| Ringlet | 40 | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 11 | 22 | . | 1 | . | . | . | . | . | . | |||