
| 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 | 59 | . | . | . | . | . | . | . | . | . | 2 | 1 | 17 | 18 | 3 | 9 | 5 | 4 | . | . | . | . | . | . | |||
| Essex Skipper | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | |||
| Large Skipper | 53 | . | . | . | . | . | . | . | 2 | 12 | 5 | 8 | 6 | 12 | 3 | 4 | . | 1 | . | . | . | . | . | . | |||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | |||
| Brimstone | 163 | 7 | 20 | 4 | 5 | 3 | 3 | 4 | . | . | . | . | . | . | 1 | 5 | 35 | 41 | 2 | 9 | 3 | 3 | . | . | |||
| Large White | 29 | . | . | . | . | . | . | . | . | . | . | . | 3 | 2 | 1 | 2 | 11 | 2 | 1 | 1 | 5 | . | 1 | . | |||
| Small White | 234 | . | . | . | . | 1 | . | . | . | . | . | 2 | 12 | 4 | . | 20 | 16 | 5 | 71 | 50 | 37 | 14 | 2 | 2 | |||
| Green-veined White | 74 | . | . | 5 | 7 | . | 1 | . | . | . | . | . | . | 2 | 6 | . | . | 7 | 1 | 17 | 8 | 20 | . | . | |||
| Orange Tip | 14 | 1 | 2 | 4 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | . | |||
| Common Blue | 37 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 4 | 8 | 6 | 8 | 7 | 3 | . | 1 | |||
| White Admiral | 5 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 3 | . | . | . | . | . | . | . | . | . | . | |||
| Purple Emperor | 4 | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | 66 | . | . | . | . | 2 | . | . | . | 1 | . | 1 | 4 | 4 | 3 | 3 | 6 | 2 | 4 | 12 | 10 | 11 | 3 | 7 | |||
| Painted Lady | 59 | . | . | . | . | 2 | . | 1 | . | 1 | . | 1 | 1 | 2 | . | 2 | 8 | 14 | 3 | 12 | 7 | 2 | 3 | 2 | |||
| Small Tortoiseshell | 51 | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 6 | . | 4 | 7 | 14 | 12 | 3 | 3 | . | . | . | |||
| Peacock | 63 | 6 | 3 | 2 | 2 | 2 | . | . | . | . | . | . | . | . | . | 3 | 15 | 14 | 6 | 4 | 1 | . | 1 | . | |||
| Comma | 71 | 5 | 3 | . | . | . | . | 2 | . | . | . | 2 | 2 | 4 | 1 | 1 | 6 | 3 | 2 | 7 | 7 | 18 | 3 | 6 | |||
| Small Pearl-bordered Fritillary | 14 | . | . | . | . | . | . | 8 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | 56 | . | . | 3 | 14 | 16 | 15 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | 162 | . | . | . | . | . | . | . | . | 1 | 8 | 20 | 28 | 31 | 8 | . | 43 | 23 | . | . | . | . | . | . | |||
| Speckled Wood | 295 | . | . | 3 | 8 | 5 | 2 | 11 | 12 | 6 | 5 | 6 | 1 | 1 | 2 | 4 | 6 | 14 | 66 | 57 | 33 | 42 | 5 | 3 | |||
| Marbled White | 7 | . | . | . | . | . | . | . | . | . | . | . | 4 | . | 3 | . | . | . | . | . | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 345 | . | . | . | . | . | . | . | . | . | . | . | 5 | 1 | 20 | 118 | 95 | 104 | 2 | . | . | . | . | . | |||
| Meadow Brown | 78 | . | . | . | . | . | . | . | . | . | . | 1 | 11 | 9 | 6 | 21 | 16 | 6 | 4 | . | 4 | . | . | . | |||
| Small Heath | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | |||
| Ringlet | 559 | . | . | . | . | . | . | . | . | 1 | 2 | 31 | 182 | 224 | 76 | 32 | 10 | 1 | . | . | . | . | . | . | |||
| Speckled Yellow | NI | . | . | . | . | . | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Humming-bird Hawk-moth | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||
| Silver Y | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | |||