
| 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 | 33 | . | . | 2 | 2 | . | 2 | 4 | 8 | 4 | 6 | 1 | 3 | 1 | . | . | . | . | |||||||||
| Essex Skipper | 6 | . | . | . | . | . | . | . | 2 | 4 | . | . | . | . | . | . | . | . | |||||||||
| Large Skipper | 7 | . | . | 1 | . | . | 5 | . | . | . | 1 | . | . | . | . | . | . | . | |||||||||
| Dingy Skipper | 39 | 17 | 8 | 8 | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | 23 | 8 | 4 | 4 | 5 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brimstone | 44 | 9 | 8 | 4 | 5 | 2 | 1 | . | . | . | 3 | 7 | 4 | 1 | . | . | . | . | |||||||||
| Large White | 26 | . | 2 | 1 | . | . | . | . | 4 | 1 | 5 | 11 | 1 | . | . | . | 1 | . | |||||||||
| Small White | 70 | . | 1 | . | . | . | . | . | 1 | 2 | 14 | 18 | 17 | 3 | 4 | 5 | . | 1 | |||||||||
| Green-veined White | 36 | 2 | 7 | 1 | . | . | . | . | 1 | 16 | . | . | . | . | 3 | 1 | . | 3 | |||||||||
| Orange Tip | NI | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Green Hairstreak | NI | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Purple Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||||
| Small Copper | 5 | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | 2 | |||||||||
| Small Blue | 5 | . | . | 2 | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | |||||||||
| Brown Argus | NI | 4 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Common Blue | 131 | 12 | 5 | 3 | 1 | 3 | 1 | . | . | . | 12 | 11 | 22 | 22 | 26 | . | . | . | |||||||||
| Chalk-hill Blue | 11 | . | . | . | . | 1 | . | . | . | . | 1 | 4 | 3 | 1 | 1 | . | . | . | |||||||||
| Adonis Blue | 79 | . | 10 | 5 | 4 | 2 | . | . | . | . | . | . | . | . | 12 | 22 | 2 | 4 | |||||||||
| Red Admiral | 19 | . | . | . | . | . | . | 2 | 3 | 2 | 5 | 4 | . | . | . | 1 | 1 | 1 | |||||||||
| Painted Lady | 4 | . | . | . | 1 | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | |||||||||
| Small Tortoiseshell | 25 | . | . | . | . | . | . | 5 | 1 | 1 | 2 | . | . | . | . | . | 9 | 7 | |||||||||
| Peacock | 29 | . | . | 1 | . | . | . | . | . | 1 | 6 | 12 | 1 | 1 | 1 | 4 | . | . | |||||||||
| Comma | 6 | . | . | . | . | . | . | . | 2 | 4 | . | . | . | . | . | . | . | . | |||||||||
| Speckled Wood | 85 | 2 | 5 | 4 | 1 | 3 | . | . | . | . | . | 3 | 9 | 9 | 17 | 13 | . | 4 | |||||||||
| Marbled White | 34 | . | . | . | . | . | 8 | 16 | 4 | 5 | 1 | . | . | . | . | . | . | . | |||||||||
| Gatekeeper / Hedge Brown | 202 | . | . | . | . | . | 3 | 5 | 14 | 36 | 49 | 54 | 18 | . | 15 | . | . | . | |||||||||
| Meadow Brown | 534 | . | . | . | . | 5 | 9 | 14 | 13 | 8 | 24 | 54 | 125 | 70 | 90 | 37 | 12 | 9 | |||||||||
| Small Heath | 177 | 2 | 5 | 8 | 10 | 8 | 40 | 23 | 5 | 9 | 8 | . | 4 | 2 | 24 | 10 | 1 | 1 | |||||||||
| Ringlet | 2 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | |||||||||