
| 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 | 17 | . | . | . | . | . | 1 | 2 | . | 10 | 1 | 1 | . | . | . | . | . | . | |||||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | |||||||||
| Large Skipper | 17 | . | . | . | . | . | . | . | . | . | . | 6 | 4 | . | 2 | . | . | . | |||||||||
| Brimstone | NI | 4 | 11 | 14 | 2 | 1 | . | 1 | . | . | . | . | 2 | 1 | 24 | 2 | 1 | . | |||||||||
| Large White | NI | . | . | . | 2 | 1 | 1 | . | . | 4 | 1 | 13 | 3 | 3 | 8 | 7 | 3 | 1 | |||||||||
| Small White | NI | . | 1 | 6 | 1 | 1 | . | . | . | 6 | . | 7 | 2 | 3 | 4 | 2 | 2 | . | |||||||||
| Green-veined White | NI | . | 4 | 9 | . | . | . | . | . | . | . | 7 | 5 | 2 | 14 | 2 | 3 | 2 | |||||||||
| Orange Tip | NI | 2 | 4 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Purple Hairstreak | 6 | . | . | . | . | . | . | . | . | . | . | 5 | . | . | . | . | . | . | |||||||||
| Small Copper | 3 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | |||||||||
| Brown Argus | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||||
| Common Blue | NI | . | . | . | 1 | 1 | 1 | . | . | 1 | . | . | . | 7 | 6 | . | . | . | |||||||||
| Holly Blue | NI | . | 1 | 1 | 1 | 1 | . | . | . | . | . | . | . | 1 | 11 | . | . | . | |||||||||
| White Admiral | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||||||
| Red Admiral | NI | . | 2 | . | . | . | 1 | . | 3 | 1 | 4 | 5 | 13 | 14 | 18 | 12 | 5 | 1 | |||||||||
| Painted Lady | NI | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | 5 | 1 | . | . | |||||||||
| Small Tortoiseshell | NI | 1 | 3 | 3 | 2 | 2 | . | 3 | 3 | . | 2 | 2 | . | 4 | 29 | 5 | 6 | . | |||||||||
| Peacock | NI | . | . | 2 | . | . | 1 | . | . | . | . | 1 | . | 8 | 5 | . | 1 | . | |||||||||
| Comma | NI | . | . | . | . | 1 | 1 | . | . | 1 | . | 11 | 3 | 1 | 1 | 5 | 5 | 1 | |||||||||
| Pearl-bordered Fritillary | NI | . | . | 4 | 1 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Dark Green Fritillary | 12 | . | . | . | . | . | . | . | . | 2 | . | 3 | 1 | . | 2 | . | . | . | |||||||||
| Silver-washed Fritillary | 41 | . | . | . | . | . | . | . | 1 | . | 3 | 11 | 8 | 1 | 5 | 1 | . | . | |||||||||
| Speckled Wood | NI | . | 3 | 11 | 2 | 10 | 11 | 7 | 10 | 5 | 5 | . | 3 | 1 | 12 | 19 | 8 | 3 | |||||||||
| Marbled White | 19 | . | . | . | . | . | . | . | . | 6 | 5 | 5 | . | 1 | . | . | . | . | |||||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | 5 | 3 | . | . | 7 | 22 | 14 | 8 | . | . | . | |||||||||
| Meadow Brown | 208 | . | . | . | . | . | 1 | 3 | 7 | 33 | 20 | 24 | 22 | 31 | 17 | 1 | . | . | |||||||||
| Ringlet | 138 | . | . | . | . | . | . | . | . | 24 | 41 | 38 | 17 | 5 | . | . | . | . | |||||||||
| Humming-bird Hawk-moth | NI | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||||||