
| 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 | ||||||||||||||||||||||||||
| Small/Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | 17 | 8 | 1 | . | . | . | . | . | . | ||||
| Small Skipper | . | . | . | . | . | . | . | 1 | 2 | . | . | 20 | 28 | 35 | 20 | 28 | 10 | . | . | . | . | . | ||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 3 | . | . | . | . | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| Dingy Skipper | . | . | . | . | 3 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | . | 1 | . | 1 | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 1 | . | 1 | 3 | 4 | 4 | 2 | 3 | 3 | 2 | . | . | . | 3 | 2 | 3 | 1 | 1 | 4 | 4 | . | 1 | ||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 5 | 1 | 1 | . | . | . | ||||
| Small White | . | . | . | . | . | 2 | . | 3 | 6 | 1 | . | 1 | . | 9 | 9 | 11 | 13 | . | 1 | 7 | 8 | 5 | ||||
| Green-veined White | . | . | 1 | . | 1 | 3 | . | . | . | . | . | . | . | 1 | . | 8 | 1 | . | 3 | . | . | . | ||||
| Orange Tip | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | . | . | . | . | 1 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 5 | 2 | 1 | . | . | . | . | 1 | ||||
| Small Blue | . | . | . | . | . | 3 | 3 | 3 | . | . | . | . | . | 1 | 4 | 2 | . | . | . | . | . | . | ||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | 1 | 1 | 2 | . | . | . | ||||
| Common Blue | . | . | . | . | . | 1 | 6 | 21 | 9 | 7 | 2 | . | 2 | 4 | 11 | 16 | 17 | 3 | 8 | 5 | 6 | 5 | ||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | 14 | 11 | 5 | 5 | 1 | . | . | ||||
| Adonis Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | ||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | . | . | ||||
| Painted Lady | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | 13 | 4 | 2 | 1 | 1 | 1 | . | 8 | 20 | 19 | 12 | 76 | 13 | 5 | ||||
| Peacock | . | . | . | 1 | 1 | . | . | . | 1 | . | . | . | . | . | 1 | 1 | 1 | 1 | . | . | . | . | ||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 3 | 9 | 3 | 4 | 6 | 3 | . | . | . | . | . | . | ||||
| Marsh Fritillary | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | 2 | . | 3 | . | . | ||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | 1 | 44 | 53 | 63 | 32 | 3 | . | . | . | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 9 | . | . | . | 8 | 57 | 94 | 80 | 34 | 5 | 1 | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | . | 66 | 34 | 29 | 54 | 66 | 67 | 142 | 231 | 199 | 148 | 108 | 67 | 48 | 28 | ||||
| Small Heath | . | . | . | . | . | 6 | 10 | 33 | 18 | 39 | 52 | 53 | 46 | 44 | 21 | 13 | 2 | 6 | 4 | 3 | 6 | 1 | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 8 | 30 | 22 | 12 | . | . | . | . | . | . | . | . | ||||
| No butterflies seen | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||