
| 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 | 142 | . | . | . | . | . | . | 2 | 31 | 37 | 46 | 25 | 2 | . | . | . | . | . | . | . | |||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | |||||||
| Large Skipper | NI | . | . | . | 2 | 4 | 5 | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | |||||||
| Dingy Skipper | NI | 282 | 8 | 15 | 12 | 2 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||
| Grizzled Skipper | NI | 118 | 6 | 7 | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | 8 | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 2 | 1 | 1 | . | . | . | . | |||||||
| Brimstone | 108 | 70 | 2 | 20 | 19 | 1 | 4 | . | . | 1 | 8 | 8 | 1 | . | 2 | . | 1 | . | . | . | |||||||
| Large White | 63 | . | . | 3 | . | . | 1 | . | 1 | 17 | 4 | 7 | 4 | 4 | 10 | 5 | 6 | 6 | . | 2 | |||||||
| Small White | 812 | 4 | 4 | 6 | 8 | . | . | . | 17 | 64 | 134 | 81 | 60 | 63 | 165 | 163 | 78 | 18 | 15 | 9 | |||||||
| Green-veined White | NI | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 1 | . | . | 1 | . | |||||||
| Orange Tip | NI | 34 | 6 | 6 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | NI | 2 | . | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brown Hairstreak | NI | . | . | . | . | . | . | . | . | . | . | 1 | . | 4 | . | 1 | . | . | . | . | |||||||
| Small Copper | 21 | . | 1 | . | 1 | . | . | . | 3 | 4 | 1 | 1 | 2 | 1 | 3 | 1 | 4 | . | . | . | |||||||
| Small Blue | NI | . | . | 2 | 18 | 29 | . | . | 2 | . | 2 | 6 | 3 | . | . | . | . | . | . | . | |||||||
| Brown Argus | 64 | . | . | . | . | . | . | . | . | 8 | 5 | 30 | 9 | 1 | 5 | 6 | . | . | . | . | |||||||
| Common Blue | 742 | . | 3 | 7 | 33 | 12 | . | . | . | 27 | 85 | 308 | 136 | 38 | 61 | 31 | 4 | 1 | . | . | |||||||
| Chalk-hill Blue | 42 | . | . | . | . | . | . | . | . | 1 | 10 | 27 | 3 | . | 1 | 1 | . | . | . | . | |||||||
| Holly Blue | 192 | 48 | 2 | 21 | 12 | 5 | . | . | 7 | 23 | 10 | 37 | 23 | . | 8 | 2 | . | . | . | . | |||||||
| Duke of Burgundy Fritillary | 11 | 4 | 1 | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Red Admiral | 14 | . | . | . | . | 1 | 1 | . | 2 | 1 | 1 | 1 | . | . | 2 | 3 | 2 | 1 | 1 | . | |||||||
| Painted Lady | 4 | . | . | . | . | 2 | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | |||||||
| Small Tortoiseshell | NI | 8 | . | . | 1 | . | 1 | . | 2 | 2 | 1 | 5 | 2 | 3 | 7 | . | 2 | . | . | 3 | |||||||
| Peacock | 18 | 2 | . | . | . | . | 1 | . | . | 5 | 1 | 4 | 3 | . | 2 | . | . | . | . | 1 | |||||||
| Comma | 19 | . | . | . | . | . | 1 | 1 | 3 | 2 | 7 | . | . | . | . | . | . | . | 1 | 4 | |||||||
| Pearl-bordered Fritillary | NI | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||||
| Speckled Wood | 88 | 18 | 12 | 7 | 8 | 3 | . | . | 4 | 4 | 7 | 4 | 5 | 2 | 6 | 4 | 2 | 3 | 2 | 2 | |||||||
| Wall Brown | 48 | . | 3 | 1 | 3 | . | . | . | . | . | 3 | 23 | 10 | 1 | 4 | . | . | . | . | . | |||||||
| Marbled White | NI | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 766 | . | . | . | . | . | . | . | 14 | 144 | 221 | 231 | 135 | 25 | 16 | 5 | . | . | . | . | |||||||
| Meadow Brown | 1168 | . | . | . | . | 1 | 27 | 20 | 62 | 178 | 173 | 157 | 144 | 123 | 179 | 114 | 24 | 9 | . | 1 | |||||||
| Small Heath | 514 | 40 | 9 | 2 | 44 | 26 | 63 | 25 | 31 | 21 | 11 | 36 | 24 | 12 | 26 | 54 | 35 | 10 | 1 | 4 | |||||||
| Ringlet | 52 | . | . | . | . | . | . | 1 | 17 | 23 | 6 | 3 | 1 | 1 | . | . | . | . | . | . | |||||||