
| 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 | 233 | . | . | . | . | . | . | . | . | . | . | 2 | 34 | 54 | 67 | 46 | 19 | 6 | 4 | . | . | . | . | ||||
| Small Skipper | 233 | . | . | . | . | . | . | . | . | . | . | 2 | 26 | 47 | 56 | 41 | 19 | 6 | 4 | . | . | . | . | ||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | 8 | 7 | 11 | 5 | . | . | . | . | . | . | . | ||||
| Large Skipper | 37 | . | . | . | . | . | . | . | . | 1 | 10 | 5 | 4 | 3 | 1 | 1 | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 64 | 4 | 7 | 9 | 9 | 10 | 6 | 2 | 1 | 1 | 1 | . | . | 1 | . | . | 1 | 3 | . | . | . | 1 | . | ||||
| Large White | 48 | . | . | . | . | 4 | 1 | 1 | 4 | . | . | . | 1 | 4 | 6 | 2 | 8 | 3 | 1 | 2 | 4 | 4 | 1 | ||||
| Small White | 52 | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | 5 | 1 | 9 | 2 | 3 | 6 | 4 | 3 | 2 | ||||
| Green-veined White | 142 | . | 1 | 2 | 3 | 8 | 8 | 7 | 3 | 1 | . | 2 | . | 13 | 10 | 12 | 26 | 9 | 7 | 5 | 7 | 5 | . | ||||
| Orange Tip | 26 | . | 6 | 4 | 1 | 3 | 6 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Purple Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||
| White-letter Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||
| Small Copper | 25 | . | . | . | 1 | 2 | 1 | 6 | 1 | 1 | . | . | . | . | 2 | 1 | 2 | 1 | 2 | 1 | . | 2 | . | ||||
| Brown Argus | 12 | . | . | . | . | . | . | . | 1 | . | . | . | . | 2 | 1 | . | 4 | 1 | 1 | . | . | . | . | ||||
| Common Blue | 76 | . | . | . | . | . | . | . | 5 | 5 | 4 | . | . | . | 1 | 5 | 16 | 8 | 15 | 5 | . | . | . | ||||
| Holly Blue | 6 | . | . | . | 1 | 1 | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | . | . | . | . | . | ||||
| Duke of Burgundy Fritillary | 6 | . | . | . | . | 2 | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| White Admiral | 5 | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 2 | . | 1 | . | . | . | . | . | . | ||||
| Red Admiral | 8 | . | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | 1 | . | 1 | 1 | . | . | ||||
| Small Tortoiseshell | 91 | 2 | 5 | 2 | . | . | 1 | . | . | . | 4 | 4 | 1 | . | 1 | 1 | 2 | 10 | 37 | 3 | 1 | 1 | . | ||||
| Peacock | 214 | 8 | 7 | 5 | 2 | 7 | 3 | 1 | 1 | . | . | . | . | 7 | 9 | 15 | 99 | 38 | 5 | . | 1 | 1 | . | ||||
| Comma | 16 | 1 | 2 | . | 1 | . | 1 | . | . | . | . | 2 | . | 1 | . | . | . | . | . | 2 | 3 | 1 | 2 | ||||
| Dark Green Fritillary | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | 87 | . | . | . | . | . | . | . | . | . | 1 | 3 | 4 | 14 | 18 | 17 | 18 | 5 | 5 | . | . | . | . | ||||
| Marsh Fritillary | 5 | . | . | . | . | . | . | . | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | 274 | 1 | 2 | 8 | 4 | 5 | 7 | 13 | 21 | 23 | 9 | 1 | 3 | 2 | 7 | 13 | 20 | 40 | 48 | 10 | 2 | . | 1 | ||||
| Marbled White | 231 | . | . | . | . | . | . | . | . | . | . | 30 | 78 | 54 | 40 | 9 | 5 | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | 412 | . | . | . | . | . | . | . | . | . | . | . | 2 | 44 | 94 | 94 | 130 | 32 | 13 | . | . | . | . | ||||
| Meadow Brown | 277 | . | . | . | . | . | . | . | . | . | 21 | 29 | 52 | 59 | 42 | 19 | 17 | 4 | . | . | . | . | . | ||||
| Small Heath | 3 | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Ringlet | 202 | . | . | . | . | . | . | . | . | . | . | 33 | 76 | 48 | 24 | 4 | . | . | . | . | . | . | . | ||||