
| 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 | NI | . | . | . | . | . | . | . | 2 | 4 | 2 | 9 | 5 | 4 | 5 | . | . | . | |||||||||
| Large Skipper | NI | . | . | . | . | . | . | 7 | 5 | 2 | 5 | 3 | 1 | 5 | . | . | . | . | |||||||||
| Dingy Skipper | NI | . | . | . | 7 | 6 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | 32 | . | . | . | 3 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Clouded Yellow | 5 | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||||
| Brimstone | NI | 15 | 22 | 9 | 19 | 21 | 17 | 5 | 4 | 1 | 2 | 3 | 5 | 22 | 24 | 2 | 14 | . | |||||||||
| Large White | NI | . | . | . | . | . | . | . | . | 2 | 5 | 10 | 13 | 9 | 41 | 21 | 4 | 6 | |||||||||
| Small White | 151 | . | . | . | 1 | 2 | 4 | 2 | 1 | 4 | 4 | 6 | 42 | 19 | 38 | 25 | 30 | 7 | |||||||||
| Green-veined White | 5 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 2 | . | . | . | |||||||||
| Orange Tip | 23 | . | . | . | 4 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | NI | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | . | 1 | . | . | |||||||||
| Small Blue | 9 | . | . | . | . | 1 | . | 4 | . | . | . | . | . | 1 | . | . | 1 | 1 | |||||||||
| Brown Argus | 14 | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | 2 | 1 | 2 | 1 | |||||||||
| Common Blue | NI | . | . | . | 1 | 2 | 13 | 13 | 7 | . | . | . | . | 5 | 10 | 12 | 5 | 13 | |||||||||
| Chalk-hill Blue | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | |||||||||
| Adonis Blue | NI | . | . | 1 | . | . | 2 | 2 | . | . | . | . | . | 1 | 1 | 2 | 1 | 3 | |||||||||
| Holly Blue | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| White Admiral | NI | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | |||||||||
| Small Tortoiseshell | 9 | . | 2 | . | . | . | 1 | 1 | . | 2 | 1 | 2 | 1 | . | . | . | . | . | |||||||||
| Peacock | NI | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | |||||||||
| Comma | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||||||
| Dark Green Fritillary | NI | . | . | . | . | . | . | 1 | 6 | 3 | 2 | 2 | 1 | . | 2 | . | . | . | |||||||||
| Silver-washed Fritillary | NI | . | . | . | . | . | . | . | . | . | 1 | 7 | 3 | 7 | 2 | 1 | 2 | . | |||||||||
| Speckled Wood | NI | . | . | . | 2 | . | 2 | 2 | . | . | . | . | . | . | 1 | 6 | . | 1 | |||||||||
| Marbled White | 93 | . | . | . | . | . | . | . | 15 | 32 | 6 | 13 | 5 | 1 | . | . | . | . | |||||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | 2 | 11 | 29 | 41 | 5 | 7 | . | . | |||||||||
| Meadow Brown | NI | . | . | . | . | . | . | . | 21 | 17 | 17 | 29 | 26 | 59 | 157 | 122 | 50 | 18 | |||||||||
| Small Heath | 104 | . | . | . | 1 | 2 | 20 | 57 | 43 | 22 | 6 | 2 | . | 3 | 9 | 10 | 6 | 5 | |||||||||
| Ringlet | 99 | . | . | . | . | . | . | . | 12 | 34 | 19 | 11 | 10 | 5 | 1 | . | . | . | |||||||||