
| 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 | . | . | . | . | . | . | . | 1 | 4 | . | . | 5 | 24 | 81 | 32 | 61 | 17 | 8 | 4 | . | . | . | ||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||
| Large Skipper | 130 | . | . | . | . | . | . | . | . | . | 28 | 10 | 24 | 29 | 11 | 3 | 4 | . | . | . | . | . | . | ||||
| Dingy Skipper | 17 | . | . | . | . | 1 | 4 | 3 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | 11 | . | . | . | . | . | 3 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 166 | 24 | 3 | 12 | 7 | 13 | 17 | 5 | 3 | 6 | 1 | . | . | . | . | 5 | 20 | 14 | 3 | 10 | 2 | . | . | ||||
| Large White | 70 | . | . | . | . | 2 | 6 | 4 | 2 | 5 | 2 | . | . | . | 3 | 11 | 9 | 2 | 4 | 6 | . | . | . | ||||
| Small White | 131 | . | . | . | 5 | 10 | 12 | 4 | 5 | 9 | . | 6 | 3 | 3 | 14 | 13 | 9 | 4 | 5 | 1 | . | 1 | . | ||||
| Green-veined White | 65 | . | . | 1 | . | 1 | 3 | 2 | . | . | . | . | . | . | . | 15 | 13 | 11 | 5 | 1 | 1 | 2 | . | ||||
| Orange Tip | 15 | . | . | . | . | 3 | 3 | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | 11 | . | . | . | . | . | 3 | . | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | 85 | . | . | . | . | 3 | 7 | 4 | 1 | . | 1 | 3 | 5 | 5 | 13 | 6 | 3 | 1 | . | 7 | . | 4 | 8 | ||||
| Brown Argus | 3 | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Common Blue | 254 | . | . | . | . | . | 1 | 26 | 43 | 34 | 5 | 3 | . | . | 2 | 4 | 22 | 26 | 12 | 12 | 3 | 1 | 2 | ||||
| Red Admiral | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | ||||
| Painted Lady | 5 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | 1 | . | . | 1 | . | . | ||||
| Small Tortoiseshell | 116 | 3 | 1 | 3 | 1 | . | 2 | . | . | . | 3 | 13 | 9 | 9 | 5 | . | 1 | 1 | 3 | 8 | 25 | 11 | 11 | ||||
| Peacock | 37 | 3 | 4 | 1 | 5 | 2 | 4 | 1 | 1 | . | . | . | . | . | . | 3 | 3 | 3 | 1 | . | . | . | . | ||||
| Comma | 38 | 17 | 2 | 4 | 1 | 2 | 1 | . | . | . | . | . | 3 | . | 3 | . | . | . | . | . | . | . | . | ||||
| Small Pearl-bordered Fritillary | 2 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | 16 | . | . | . | . | . | . | . | . | . | 1 | . | 7 | 4 | 2 | . | . | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||
| Speckled Wood | 225 | . | . | . | 2 | 1 | 7 | 1 | 3 | 14 | 15 | 14 | 6 | 4 | 7 | 16 | 6 | 11 | 21 | 16 | 18 | 22 | 11 | ||||
| Wall Brown | 64 | . | . | . | . | . | . | 5 | 4 | . | . | . | . | . | . | 11 | 13 | 9 | 11 | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | 245 | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 86 | 62 | 37 | 10 | 1 | . | . | . | ||||
| Meadow Brown | 1181 | . | . | . | . | . | . | . | . | 3 | 19 | 31 | 45 | 94 | 63 | 197 | 214 | 147 | 89 | 71 | 45 | 13 | 9 | ||||
| Small Heath | 344 | . | . | . | . | 1 | 4 | 27 | 44 | 44 | 33 | 26 | 13 | 8 | 13 | 11 | 14 | 5 | 9 | 2 | 3 | . | . | ||||
| Ringlet | 95 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 19 | 25 | 12 | 6 | 10 | 1 | . | . | . | . | ||||