
| 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 | 100 | . | . | . | . | . | . | . | . | . | . | 10 | 25 | 27 | 24 | 9 | 3 | . | . | . | . | . | |||||
| Large Skipper | 30 | . | . | . | . | . | . | 1 | 8 | 6 | 7 | 7 | 3 | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | |||||
| Brimstone | 26 | . | 2 | 1 | 7 | 2 | 1 | . | . | . | 1 | . | . | 2 | . | . | . | . | 1 | . | . | . | |||||
| Large White | 37 | . | . | . | . | 1 | . | . | . | . | . | . | 3 | 7 | 5 | 3 | 3 | 7 | 1 | . | . | 1 | |||||
| Small White | 40 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 6 | 6 | 1 | 5 | 10 | 5 | . | . | |||||
| Green-veined White | 70 | . | . | 1 | . | 4 | 3 | . | . | . | . | . | 4 | 8 | 11 | 10 | 12 | . | 3 | 4 | . | . | |||||
| Orange Tip | 5 | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | . | . | . | . | |||||
| Small Copper | 10 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 1 | . | 1 | . | 2 | . | |||||
| Brown Argus | 31 | . | . | . | . | . | 1 | 1 | 1 | 1 | 2 | . | . | . | 8 | 1 | 4 | 5 | . | 4 | . | . | |||||
| Common Blue | 22 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 2 | . | 5 | 8 | 1 | . | . | . | |||||
| Adonis Blue | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||
| Holly Blue | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| White Admiral | 13 | . | . | . | . | . | . | . | . | . | 1 | 6 | 3 | 2 | 1 | . | . | . | . | . | . | . | |||||
| Red Admiral | 22 | . | 1 | . | 1 | . | . | 1 | 2 | . | . | 1 | 1 | 1 | 4 | . | . | 1 | 1 | 1 | 1 | 3 | |||||
| Painted Lady | 9 | . | . | . | . | 1 | . | . | 1 | 3 | 1 | . | 1 | . | . | 2 | . | . | . | . | . | . | |||||
| Small Tortoiseshell | 5 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Peacock | 16 | . | . | 3 | 1 | 2 | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | 1 | . | . | |||||
| Comma | 76 | 3 | 6 | 5 | . | 2 | 2 | 1 | . | . | . | 3 | 5 | 1 | 2 | 1 | . | 2 | 9 | 11 | 2 | 3 | |||||
| Silver-washed Fritillary | 86 | . | . | . | . | . | . | . | . | . | 2 | 7 | 16 | 16 | 23 | 6 | 9 | 3 | . | . | . | . | |||||
| Speckled Wood | 351 | . | . | 1 | 9 | 13 | 7 | 6 | 19 | 13 | 6 | 2 | 5 | 21 | 27 | 28 | 17 | 41 | 25 | 8 | 23 | 16 | |||||
| Marbled White | 16 | . | . | . | . | . | . | . | . | . | . | 3 | 3 | 7 | 2 | . | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 167 | . | . | . | . | . | . | . | . | . | . | . | 3 | 46 | 57 | 29 | 17 | 9 | . | . | . | . | |||||
| Meadow Brown | 308 | . | . | . | . | . | . | . | 7 | 13 | 54 | 56 | 59 | 60 | 25 | 19 | 4 | 2 | . | . | . | . | |||||
| Small Heath | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | |||||
| Ringlet | 122 | . | . | . | . | . | . | . | . | 1 | 11 | 28 | 53 | 17 | 5 | 1 | . | . | . | . | . | . | |||||