
| 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 | 24 | . | . | . | . | . | . | . | . | . | . | 30 | 31 | 13 | 36 | 5 | 6 | 2 | 1 | . | . | . | . | ||||
| Silver-spotted Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Large Skipper | NI | . | . | . | . | . | . | . | . | 14 | 8 | . | 1 | . | . | 1 | . | . | . | . | . | . | . | ||||
| Dingy Skipper | NI | . | . | 1 | . | 3 | 26 | 4 | 3 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | 79 | . | . | 2 | 2 | 4 | 14 | 9 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Clouded Yellow | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||
| Brimstone | 120 | 1 | 9 | 19 | 3 | 29 | 9 | 12 | 8 | 12 | 5 | . | . | 1 | 12 | 23 | 4 | . | 2 | . | 6 | . | . | ||||
| Large White | NI | . | . | . | . | 1 | . | 1 | 1 | 1 | . | 1 | 5 | 2 | 9 | 12 | 5 | 9 | 4 | 2 | . | 2 | . | ||||
| Small White | NI | . | . | 1 | 1 | . | 1 | 3 | . | . | . | 5 | 5 | 15 | 42 | 29 | 37 | 35 | 24 | 9 | 6 | 5 | 1 | ||||
| Green-veined White | NI | . | 2 | 2 | 2 | 3 | . | . | . | . | 2 | . | 7 | 7 | 27 | 2 | 8 | 8 | 5 | 1 | . | . | . | ||||
| Orange Tip | NI | . | . | . | . | 4 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | NI | . | . | . | . | 2 | 6 | . | . | 1 | . | . | 1 | 1 | 11 | 1 | 9 | 3 | 6 | 1 | 3 | 1 | 1 | ||||
| Brown Argus | 8 | . | . | . | . | . | . | . | 2 | 3 | . | . | . | . | 5 | . | . | 4 | . | . | . | . | . | ||||
| Common Blue | 264 | . | . | . | . | . | . | 17 | 28 | 51 | 17 | 3 | 2 | . | 9 | 3 | 34 | 26 | 60 | 14 | 13 | . | . | ||||
| Chalk-hill Blue | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | 5 | 30 | 10 | 20 | 21 | 17 | 5 | 3 | . | . | ||||
| Holly Blue | NI | . | . | 1 | . | . | . | . | . | . | . | . | . | . | 7 | 3 | 3 | 1 | . | . | . | . | . | ||||
| Duke of Burgundy Fritillary | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Red Admiral | 4 | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | 1 | 1 | ||||
| Painted Lady | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | ||||
| Small Tortoiseshell | 8 | 1 | 2 | 7 | . | 2 | . | . | . | . | 1 | 10 | 4 | 3 | 9 | 3 | . | . | . | . | . | . | . | ||||
| Peacock | 15 | 4 | 3 | 5 | 2 | 8 | 2 | 1 | . | . | . | . | . | . | 12 | . | . | . | . | . | . | . | 1 | ||||
| Comma | 11 | 1 | . | 1 | 1 | . | 1 | . | . | 2 | . | 1 | 1 | 2 | 3 | 1 | . | . | . | . | . | 1 | 2 | ||||
| Speckled Wood | 20 | . | 1 | . | . | . | 1 | . | 2 | 2 | 2 | 2 | . | . | 2 | . | . | 2 | 7 | 5 | 1 | 2 | . | ||||
| Marbled White | 46 | . | . | . | . | . | . | . | . | . | 14 | 59 | 32 | 5 | 1 | 3 | . | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | 3 | 11 | 46 | 130 | 43 | 78 | 19 | 6 | . | . | . | . | ||||
| Meadow Brown | NI | . | . | . | . | . | . | . | . | 12 | 44 | 109 | 73 | 93 | 174 | 80 | 128 | 126 | 112 | 22 | 11 | 1 | . | ||||
| Small Heath | 112 | . | . | . | . | . | 1 | . | 9 | 68 | 32 | 66 | 26 | 5 | 7 | . | 4 | 16 | 16 | 9 | 20 | 1 | . | ||||
| Ringlet | 82 | . | . | . | . | . | . | . | . | . | 27 | 106 | 49 | 10 | 2 | 1 | . | 1 | . | . | . | . | . | ||||
| Six-spot Burnet | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 9 | . | . | . | . | . | . | . | . | ||||
| Latticed Heath | NI | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Silver Y | NI | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | 3 | . | . | . | . | . | ||||
| The Cinnabar | NI | . | . | . | . | 4 | 18 | 9 | 5 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Burnet Companion | NI | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||