
| 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 | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 71 | 102 | 59 | 25 | 14 | 4 | . | . | . | |||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||
| Large Skipper | 38 | . | . | . | . | . | . | . | . | . | . | 1 | 9 | 10 | 15 | 2 | 1 | . | . | . | . | . | . | . | |||
| Dingy Skipper | 29 | . | . | . | . | . | . | . | . | 4 | 11 | 8 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | 41 | . | . | . | . | . | . | . | 1 | 8 | 12 | 13 | 4 | 2 | . | . | . | . | . | . | . | . | . | . | |||
| Clouded Yellow | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 2 | 1 | . | . | . | |||
| Brimstone | 36 | 5 | 6 | 6 | 4 | . | 1 | . | . | 1 | 1 | . | . | . | . | . | 1 | 1 | 2 | 1 | . | . | . | . | |||
| Large White | 45 | . | . | . | 1 | 1 | . | 1 | 4 | 4 | 4 | 10 | 6 | 4 | 1 | 1 | 1 | 3 | 1 | 2 | . | . | . | . | |||
| Small White | 24 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | 8 | 7 | 5 | 1 | . | . | . | |||
| Green-veined White | 35 | . | . | . | . | . | 1 | . | 1 | 6 | 2 | 3 | 1 | . | . | . | 1 | 1 | 2 | 5 | 11 | 1 | . | . | |||
| Orange Tip | 7 | . | . | . | 1 | . | 1 | 1 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | 17 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 5 | 2 | 4 | 2 | . | . | . | |||
| Small Copper | 30 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 6 | 4 | 6 | 3 | 3 | 2 | |||
| Brown Argus | 47 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 5 | 18 | 14 | 7 | 1 | . | |||
| Common Blue | 113 | . | . | . | . | . | . | . | . | . | 1 | 3 | 7 | 7 | 2 | 2 | 2 | 8 | 16 | 28 | 17 | 15 | 3 | . | |||
| Holly Blue | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | |||
| Duke of Burgundy Fritillary | 29 | . | . | . | . | . | . | 1 | 3 | 13 | 9 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| White Admiral | 18 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 6 | 8 | 3 | . | . | . | . | . | . | . | |||
| Red Admiral | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 1 | . | . | . | . | |||
| Painted Lady | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | |||
| Small Tortoiseshell | 21 | 2 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | 6 | 6 | . | . | . | . | . | . | 1 | |||
| Peacock | 70 | 1 | 4 | 9 | 9 | 8 | 3 | 4 | 2 | . | . | . | . | . | . | . | 1 | 8 | 11 | 3 | . | . | . | . | |||
| Comma | 16 | . | 1 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | 3 | 2 | |||
| Small Pearl-bordered Fritillary | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | 20 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 5 | 5 | 4 | 2 | . | . | . | . | |||
| Marsh Fritillary | 8 | . | . | . | . | . | . | . | . | 1 | 2 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||
| Speckled Wood | 94 | . | . | . | . | . | . | 1 | 2 | . | 3 | 5 | 8 | 7 | 4 | 2 | 1 | 4 | 2 | 6 | 7 | 12 | 11 | 8 | |||
| Wall Brown | 5 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | |||
| Marbled White | 147 | . | . | . | . | . | . | . | . | . | . | . | . | . | 18 | 45 | 43 | 22 | 17 | 2 | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 475 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 44 | 85 | 126 | 109 | 81 | 27 | 3 | . | . | |||
| Meadow Brown | 128 | . | . | . | . | . | . | . | . | . | . | . | 2 | 11 | 20 | 30 | 25 | 20 | 11 | 9 | . | . | . | . | |||
| Small Heath | 12 | . | . | . | . | . | . | . | . | 1 | 4 | 4 | 1 | . | 1 | . | . | . | . | . | . | 1 | . | . | |||
| Ringlet | 147 | . | . | . | . | . | . | . | . | . | . | . | 5 | 15 | 33 | 66 | 22 | 3 | 3 | . | . | . | . | . | |||
| Unknown White | NI | . | . | . | . | . | . | . | 1 | 3 | 2 | 7 | 1 | . | 1 | 2 | . | 1 | 6 | . | 4 | 1 | . | . | |||
| Unknown Fritillary | NI | . | . | . | . | . | . | . | 1 | 9 | 13 | 8 | 5 | 9 | . | . | . | . | . | . | . | . | . | . | |||