
| 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 | 114 | . | . | . | . | . | . | . | . | 4 | 12 | 20 | 26 | 24 | 9 | 3 | . | . | . | ||||||||
| Essex Skipper | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||||
| Large Skipper | 73 | . | . | . | . | . | 2 | 3 | 3 | 11 | 15 | 18 | 8 | 7 | 2 | . | . | . | . | ||||||||
| Grizzled Skipper | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Clouded Yellow | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 3 | ||||||||
| Brimstone | 143 | 8 | 9 | 7 | 6 | 7 | 9 | 2 | . | . | . | . | 2 | 15 | 21 | 20 | . | . | 7 | ||||||||
| Large White | 25 | . | . | . | 1 | . | . | . | . | . | 1 | 3 | . | 5 | 1 | 4 | 2 | . | 4 | ||||||||
| Small White | 113 | . | . | 1 | 1 | . | 1 | . | . | 2 | 2 | 1 | 6 | 6 | 15 | 16 | 10 | 19 | 8 | ||||||||
| Green-veined White | 58 | 1 | 3 | 2 | . | . | . | . | 1 | . | . | 3 | 3 | 4 | 5 | 8 | 1 | 6 | 11 | ||||||||
| Orange Tip | 23 | 4 | 4 | 4 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | 6 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | 2 | . | ||||||||
| Small Copper | 11 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 2 | ||||||||
| Brown Argus | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | ||||||||
| Common Blue | 43 | . | . | . | . | . | . | 1 | . | 2 | 1 | . | . | 2 | 8 | 13 | . | 6 | 2 | ||||||||
| White Admiral | 14 | . | . | . | . | . | . | . | . | 1 | 1 | 6 | 3 | 2 | . | . | . | . | . | ||||||||
| Red Admiral | 46 | . | . | . | . | . | . | . | . | . | 6 | 2 | . | 6 | 4 | 7 | . | 8 | 4 | ||||||||
| Painted Lady | 65 | . | . | . | . | 2 | . | 1 | . | 2 | 1 | . | . | . | 15 | 21 | 2 | 7 | 2 | ||||||||
| Small Tortoiseshell | 87 | . | . | . | . | . | . | 1 | 2 | 3 | 3 | 3 | . | . | 25 | 32 | . | . | 3 | ||||||||
| Peacock | 69 | 5 | 9 | 3 | . | 1 | . | . | . | . | . | . | . | 4 | 18 | 9 | . | . | . | ||||||||
| Comma | 90 | 1 | . | . | . | 1 | . | . | . | 1 | 1 | 4 | 3 | 2 | 3 | 2 | 17 | 14 | 23 | ||||||||
| Small Pearl-bordered Fritillary | 23 | . | . | . | 1 | 7 | 11 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Pearl-bordered Fritillary | 86 | . | 28 | 11 | 27 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Silver-washed Fritillary | 261 | . | . | . | . | . | . | . | . | 13 | 47 | 30 | 27 | 35 | 55 | 9 | . | . | . | ||||||||
| Speckled Wood | 122 | 1 | 2 | 2 | 1 | 1 | 5 | 4 | 3 | 2 | 2 | 2 | 1 | 8 | 3 | 13 | 12 | 20 | 16 | ||||||||
| Marbled White | 11 | . | . | . | . | . | . | . | . | . | 2 | 2 | 6 | 1 | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | 270 | . | . | . | . | . | . | . | . | . | . | 8 | 11 | 69 | 84 | 22 | . | . | . | ||||||||
| Meadow Brown | 235 | . | . | . | . | . | . | . | 1 | 15 | 36 | 48 | 60 | 24 | 21 | 4 | . | 2 | 1 | ||||||||
| Ringlet | 328 | . | . | . | . | . | . | . | . | 3 | 51 | 139 | 84 | 32 | 2 | . | . | . | . | ||||||||
| Six-spot Burnet | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | ||||||||
| Five-spot Burnet | NI | . | . | . | . | . | . | . | . | 7 | 4 | 3 | 1 | . | . | . | . | . | . | ||||||||
| Argent & Sable | NI | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Speckled Yellow | NI | . | . | 3 | 2 | 7 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Silver Y | NI | . | 1 | . | . | . | 2 | . | 1 | . | 4 | 3 | . | 4 | 1 | 14 | . | 1 | 3 | ||||||||
| The Cinnabar | NI | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | ||||||||
| Burnet Companion | NI | . | . | . | . | . | 2 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | ||||||||