
| 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 | 32 | . | . | . | . | . | . | . | 3 | 8 | 15 | 5 | 1 | . | . | . | . | . | . | . | . | ||||||
| Small Skipper | NI | . | . | . | . | . | . | . | . | 8.5 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Large Skipper | 14 | . | . | . | . | . | . | 5 | 3.5 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 17 | 3 | 2 | 0.5 | . | . | . | . | . | . | 2 | . | . | . | 1 | . | . | . | . | 2 | . | ||||||
| Large White | 61 | . | 1.5 | 4 | 4 | 5 | . | . | 0.5 | 6 | 6 | 6 | 2 | 2 | 5 | 1 | 2 | 1 | . | 1 | . | ||||||
| Small White | 21 | . | 1 | 1 | . | . | . | . | . | 2.5 | . | 5 | 2 | . | 2 | 3 | 2 | 3 | . | . | . | ||||||
| Green-veined White | 95 | . | 5.5 | 2.5 | 12 | 1 | 2 | 1 | . | 6.5 | 5 | 5 | 6 | 7 | 7 | 4 | 3 | 6 | 1 | 1 | . | ||||||
| Orange Tip | 17 | . | 4.5 | 3.5 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | 2 | . | . | . | . | . | . | . | . | 0.5 | 1 | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Small Copper | 10 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 2 | . | 2 | 1 | 2 | 2 | . | . | ||||||
| Brown Argus | 25 | . | . | . | . | . | . | . | . | . | . | . | 5 | 6 | 7 | 7 | . | . | . | . | . | ||||||
| Common Blue | 2 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | ||||||
| Holly Blue | 3 | . | . | 0.5 | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | ||||||
| White Admiral | NI | . | . | . | . | . | . | . | 2.5 | 8.5 | 5 | 1 | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | 27 | . | . | . | . | . | . | . | 0.5 | 1.5 | 2 | 2 | . | 4 | 4 | . | 1 | 4 | 2 | . | 3 | ||||||
| Painted Lady | 5 | . | . | . | . | 1 | . | . | 0.5 | . | . | . | 1 | . | 1 | . | . | . | . | 1 | . | ||||||
| Small Tortoiseshell | NI | . | . | . | . | . | . | . | . | 0.5 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Peacock | 54 | 3.5 | 5.5 | 4.5 | . | . | . | . | . | . | 1 | 19 | . | 1 | 1 | . | . | . | . | 1 | . | ||||||
| Comma | NI | 16.5 | 2 | 1 | . | . | . | . | 1 | 3.5 | 3 | 1 | 1 | . | 1 | 2 | 10 | 8 | 18 | 6 | . | ||||||
| Silver-washed Fritillary | 239 | . | . | . | . | . | . | . | 2 | 50 | 38 | 37 | 33 | 29 | 3 | 3 | . | . | . | . | . | ||||||
| Speckled Wood | 111 | . | . | 1 | . | 2 | 3 | 4 | 0.5 | 0.5 | . | 2 | 10 | 13 | 11 | 19 | 17 | 13 | 7 | . | 4 | ||||||
| Marbled White | 10 | . | . | . | . | . | . | . | . | 2.5 | 4 | 1 | 1 | . | . | . | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | 124 | . | . | . | . | . | . | . | . | 9.5 | 14 | 34 | 30 | 24 | 7 | 4 | . | . | . | . | . | ||||||
| Meadow Brown | 468 | . | . | . | . | . | . | 9 | 36 | 111.5 | 47 | 55 | 27 | 25 | 7 | 3 | 1 | . | . | . | . | ||||||
| Small Heath | 2 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Ringlet | NI | . | . | . | . | . | . | . | 11.5 | 21.5 | 4 | 4 | . | . | . | . | . | . | . | . | . | ||||||