
| 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 Skipper | . | . | . | . | . | . | . | 5 | 19 | 15 | 10 | 7 | . | . | . | . | . | |||||||||
| Large Skipper | . | . | . | . | . | 2 | 3 | 1 | 2 | . | . | . | . | . | . | . | . | |||||||||
| Dingy Skipper | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | . | 1 | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brimstone | 5 | 3 | 7 | 10 | 2 | 4 | 2 | 1 | 2 | . | 6 | 5 | 4 | 2 | 6 | . | . | |||||||||
| Large White | 2 | 1 | 11 | 8 | 16 | 12 | 8 | 10 | 4 | . | 5 | 16 | 8 | 6 | 7 | 2 | 2 | |||||||||
| Small White | 3 | . | 3 | 7 | 4 | 5 | 4 | 3 | 9 | 4 | 31 | 46 | 4 | 18 | 8 | 5 | 10 | |||||||||
| Green-veined White | 15 | 5 | 25 | 33 | 31 | 16 | 6 | 6 | 11 | 6 | 34 | 26 | 16 | 3 | 1 | 4 | 1 | |||||||||
| Orange Tip | 5 | 1 | 9 | 3 | 3 | 3 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Green Hairstreak | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Purple Hairstreak | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | 2 | 19 | . | . | |||||||||
| White-letter Hairstreak | . | . | . | . | . | . | . | . | . | . | 3 | 3 | 1 | 1 | 2 | . | . | |||||||||
| Small Copper | . | . | . | . | 1 | 1 | 1 | . | . | . | 21 | 37 | 10 | 19 | 9 | 1 | 1 | |||||||||
| Brown Argus | . | . | 1 | 1 | 1 | 4 | 1 | . | . | 2 | 3 | 34 | 21 | 62 | 63 | 6 | 8 | |||||||||
| Common Blue | 7 | . | 5 | 19 | 21 | 17 | 12 | 6 | 2 | 4 | 42 | 135 | 49 | 67 | 30 | 1 | . | |||||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | 1 | 6 | 17 | 45 | 2 | . | . | 1 | . | |||||||||
| Holly Blue | . | 1 | . | . | . | 1 | . | . | . | 1 | 7 | 4 | 4 | 4 | . | . | . | |||||||||
| Red Admiral | . | . | . | . | . | . | . | . | 1 | 1 | 7 | 4 | . | . | 3 | 2 | 2 | |||||||||
| Small Tortoiseshell | . | . | . | . | . | . | 7 | 11 | 10 | . | 1 | 3 | 2 | 4 | 2 | 2 | 2 | |||||||||
| Peacock | . | 1 | 1 | . | . | 1 | . | . | 4 | 1 | 8 | 12 | 3 | . | 2 | . | . | |||||||||
| Comma | 1 | . | . | . | . | . | . | . | 4 | 2 | 15 | 1 | . | . | 1 | 4 | . | |||||||||
| Small Pearl-bordered Fritillary | . | . | . | . | 3 | 3 | 5 | . | . | . | . | . | . | . | . | . | . | |||||||||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 7 | 7 | 1 | . | . | . | . | |||||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | 8 | 1 | 18 | 4 | 2 | . | . | . | . | |||||||||
| Speckled Wood | 3 | 1 | 2 | 7 | 21 | 19 | 16 | 18 | 15 | 1 | 2 | 32 | 23 | 77 | 99 | 25 | 25 | |||||||||
| Wall Brown | . | . | . | 2 | . | . | . | . | . | . | . | . | 4 | 9 | 5 | 1 | . | |||||||||
| Marbled White | . | . | . | . | . | . | . | 12 | 55 | 9 | 1 | 3 | . | . | . | . | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 3 | . | 15 | 9 | 1 | 1 | . | . | . | |||||||||
| Meadow Brown | . | . | . | . | . | 24 | 53 | 92 | 110 | 53 | 209 | 131 | 6 | 3 | 1 | . | . | |||||||||
| Small Heath | . | . | . | 4 | 7 | 12 | 13 | 9 | 11 | 3 | 3 | 5 | 16 | 12 | 8 | 3 | 5 | |||||||||
| Ringlet | . | . | . | . | . | . | . | 2 | 8 | 3 | 6 | 4 | . | . | . | . | . | |||||||||