
| 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 | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 6 | . | . | . | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | 1 | 4 | 6 | 16 | 9 | 8 | 2 | 1 | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | . | . | 1 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 2 | 16 | 23 | 21 | 13 | 18 | 10 | 4 | 2 | 4 | 1 | 4 | 6 | . | 2 | 18 | 23 | 17 | 12 | 8 | 3 | |||||
| Large White | . | . | . | . | . | . | 1 | 2 | 3 | . | 2 | 2 | 1 | . | 2 | 10 | 7 | 8 | 5 | 11 | 2 | |||||
| Small White | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | 3 | 5 | 2 | . | 1 | . | |||||
| Green-veined White | . | . | . | 4 | . | 3 | 2 | 1 | 4 | 1 | 5 | 1 | . | . | 7 | 6 | 4 | 4 | 2 | . | . | |||||
| Orange Tip | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | . | . | . | . | 2 | 3 | 8 | 14 | 12 | 3 | 14 | 6 | 3 | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||||
| Small Copper | . | . | . | . | . | . | . | . | 1 | . | 1 | 1 | . | . | . | . | . | . | . | . | . | |||||
| Common Blue | . | . | . | . | . | 1 | . | 2 | 1 | 1 | 3 | 1 | 1 | . | 3 | 4 | 6 | . | . | 1 | . | |||||
| Holly Blue | . | 2 | . | 3 | 1 | . | . | . | . | . | . | . | . | . | . | 5 | 4 | 5 | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 2 | . | . | . | . | . | |||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | 3 | . | . | . | |||||
| Small Tortoiseshell | . | 2 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 2 | . | . | . | |||||
| Peacock | 15 | 11 | 5 | 4 | 1 | . | 1 | . | . | . | . | . | . | 1 | 7 | 48 | 15 | 8 | . | 2 | . | |||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 3 | 2 | 1 | . | 1 | . | |||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | 15 | 14 | 20 | 14 | 8 | 12 | . | . | . | . | . | . | . | . | . | . | |||||
| Pearl-bordered Fritillary | . | . | . | 1 | 11 | 15 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 8 | 7 | 8 | 3 | 1 | 1 | . | . | |||||
| Marsh Fritillary | . | . | . | . | . | . | 2 | 9 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Heath Fritillary | . | . | . | . | . | . | . | 14 | 26 | 7 | 31 | 34 | 10 | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | 1 | 3 | 3 | 4 | . | 1 | 4 | 4 | 10 | 1 | 6 | 1 | 5 | . | 4 | 6 | 10 | 8 | 7 | 7 | 3 | |||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 20 | 10 | . | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | 22 | 74 | 45 | 28 | 19 | 4 | . | 1 | |||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 1 | 8 | 23 | 18 | 36 | 26 | 9 | 7 | 1 | . | 1 | . | |||||
| Small Heath | . | . | . | . | . | 1 | . | 1 | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 4 | 20 | 85 | 68 | 29 | 1 | . | . | . | . | . | |||||