
| 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 | ||||||||||||||||||||||||||
| Dingy Skipper | . | . | . | . | 20 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | . | 2 | . | 8 | 24 | 4 | 6 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Wood White | . | . | 2 | . | 6 | 4 | 46 | 12 | 12 | 26 | 2 | . | . | . | . | . | . | . | ||||||||
| Brimstone | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 4 | . | ||||||||
| Green Hairstreak | . | . | 18 | 2 | 14 | 2 | 2 | 2 | 2 | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 6 | . | 2 | 2 | . | ||||||||
| Brown Argus | . | . | . | . | . | 2 | . | 2 | . | . | 2 | . | . | . | . | . | . | . | ||||||||
| Common Blue | . | . | . | . | 6 | 26 | 60 | 26 | 22 | 10 | . | . | . | 8 | . | 18 | 10 | 8 | ||||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 2 | ||||||||
| Small Pearl-bordered Fritillary | . | . | . | . | 4 | 8 | 24 | 14 | 4 | 10 | 2 | 2 | . | . | . | . | . | . | ||||||||
| Pearl-bordered Fritillary | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 10 | 16 | 2 | 4 | 6 | . | 2 | . | . | ||||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | 6 | 2 | . | ||||||||
| Marsh Fritillary | . | . | . | 18 | . | 14 | 12 | 2 | 2 | . | . | . | . | . | . | . | . | . | ||||||||