
| 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 | 96 | . | . | . | . | . | . | . | . | . | 7 | 29 | 41 | 11 | . | . | . | . | . | . | . | . | . | ||||
| Essex Skipper | 10 | . | . | . | . | . | . | . | . | . | . | 7 | 2 | . | . | . | . | . | . | . | . | . | . | ||||
| Lulworth Skipper | NI | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Large Skipper | 52 | . | . | . | . | . | . | . | 2 | 18 | . | 12 | 8 | 5 | 1 | . | . | . | . | . | . | . | . | ||||
| Clouded Yellow | 8 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | 2 | . | . | . | 2 | . | . | ||||
| Brimstone | 308 | 2 | 8 | 33 | 36 | 13 | 13 | 17 | 3 | 1 | 3 | 13 | 8 | 45 | 15 | 24 | 8 | 2 | . | 1 | . | . | 1 | ||||
| Large White | 104 | . | . | . | 4 | . | 2 | 5 | . | . | 1 | 6 | 6 | 38 | 11 | 10 | 3 | 2 | . | 1 | 3 | . | . | ||||
| Small White | 47 | . | . | . | . | . | 1 | 1 | . | . | . | 3 | 3 | 10 | 9 | 1 | 3 | 9 | 3 | . | . | . | . | ||||
| Green-veined White | 218 | . | 1 | 7 | 11 | 4 | 1 | 3 | . | . | 4 | 34 | 13 | 30 | 29 | 17 | 16 | 15 | 5 | . | 1 | . | . | ||||
| Orange Tip | NI | . | . | 8 | 15 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Purple Hairstreak | 17 | . | . | . | . | . | . | . | 1 | 2 | . | 3 | 3 | 3 | 3 | . | . | . | . | . | . | . | . | ||||
| White-letter Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | 12 | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | 2 | 3 | . | 1 | . | . | 3 | 1 | . | ||||
| Common Blue | 6 | . | . | . | . | . | . | 5 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Holly Blue | 17 | . | . | 1 | 1 | 3 | . | 1 | . | . | . | 3 | 2 | 1 | . | . | . | . | . | . | 1 | . | . | ||||
| Red Admiral | 92 | 1 | . | . | . | . | . | . | 3 | 1 | 5 | 15 | 7 | 16 | 13 | 8 | 1 | . | 1 | . | 4 | 1 | 5 | ||||
| Painted Lady | 23 | . | . | . | 1 | 1 | 1 | 2 | 2 | 3 | 1 | . | . | 1 | 6 | 1 | . | 1 | . | . | . | . | . | ||||
| Small Tortoiseshell | 11 | . | . | 1 | 1 | . | . | . | . | 1 | . | 6 | . | . | . | . | . | . | . | . | . | . | . | ||||
| Peacock | 99 | . | 2 | 4 | 10 | . | 2 | 3 | . | . | 1 | . | 2 | 29 | 2 | 33 | . | . | . | . | . | . | 1 | ||||
| Comma | 74 | . | 1 | . | . | 1 | 1 | 1 | 1 | 1 | 5 | 13 | 4 | 18 | 10 | . | 4 | 1 | . | . | 1 | . | . | ||||
| Silver-washed Fritillary | 4 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | 1 | . | . | . | . | ||||
| Speckled Wood | 92 | . | . | 3 | . | . | . | 3 | 1 | 5 | 7 | . | 1 | 8 | 6 | 1 | 5 | 18 | 5 | . | 3 | 5 | 13 | ||||
| Marbled White | 128 | . | . | . | . | . | . | . | . | 7 | 19 | 56 | 25 | 4 | . | . | . | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | 273 | . | . | . | . | . | . | . | . | . | . | 23 | 36 | 90 | 53 | 31 | 11 | 2 | . | . | . | . | . | ||||
| Meadow Brown | 782 | . | . | . | . | . | . | . | 2 | 38 | 150 | 197 | 79 | 104 | 56 | 29 | 7 | 6 | . | . | . | . | . | ||||
| Small Heath | 3 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 2 | . | . | . | . | ||||
| Ringlet | 70 | . | . | . | . | . | . | . | 1 | 1 | 3 | 32 | 13 | 7 | 2 | 2 | . | . | . | . | . | . | . | ||||