
| 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 | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Skipper | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | 8 | 5 | 32 | 29 | 16 | 13 | 3 | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | ||||||
| Brimstone | 5 | 5 | 11 | 4 | 4 | 3 | 5 | . | 1 | 2 | 1 | 1 | 3 | . | 3 | . | 3 | 4 | 1 | 2 | ||||||
| Large White | . | . | . | . | 1 | . | 3 | . | . | . | 1 | 3 | 2 | 1 | 5 | . | . | 1 | . | . | ||||||
| Small White | . | . | . | . | 1 | 1 | . | . | . | . | 1 | 7 | . | 4 | 11 | 3 | 3 | . | 1 | 1 | ||||||
| Green-veined White | . | 4 | 16 | 6 | . | 10 | . | . | 2 | 2 | 8 | 15 | 37 | 14 | 16 | 7 | . | . | 5 | 3 | ||||||
| Orange Tip | . | 4 | 4 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | . | 1 | . | 8 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | 4 | 1 | 3 | 5 | . | 3 | 1 | 5 | 6 | ||||||
| Common Blue | . | . | . | . | . | . | . | . | 2 | . | . | . | . | 2 | 2 | . | . | . | . | . | ||||||
| Holly Blue | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 2 | . | 2 | 2 | 1 | . | 1 | 1 | ||||||
| Painted Lady | . | . | 1 | . | . | . | . | . | . | . | 4 | 1 | 2 | 2 | 1 | . | . | . | 1 | 3 | ||||||
| Small Tortoiseshell | 3 | . | 1 | . | 2 | . | . | . | . | . | . | 3 | 5 | 1 | 1 | 3 | 2 | 9 | 12 | . | ||||||
| Peacock | . | 1 | . | . | . | 2 | 1 | . | . | . | . | . | 8 | 5 | 4 | 3 | 2 | 9 | . | . | ||||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | ||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||
| Speckled Wood | . | . | 1 | . | . | . | . | . | . | . | . | . | 2 | 3 | 2 | 12 | 10 | 7 | 11 | 4 | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 23 | 46 | 11 | 9 | . | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | 18 | 30 | 70 | 83 | 53 | 19 | 10 | . | . | . | . | . | ||||||
| Large Heath | . | . | . | . | 1 | . | 42 | 22 | 55 | 62 | 4 | 4 | . | . | . | . | . | . | . | . | ||||||
| Ringlet | . | . | . | . | . | . | . | . | 8 | 13 | 18 | 8 | 4 | . | . | . | . | . | . | . | ||||||