
| 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 | . | . | . | . | . | . | . | . | . | . | . | 15 | 34 | 94 | 60 | 50 | 36 | 13 | 4 | 1 | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | . | 7 | 16 | 8 | 23 | 20 | 23 | 1 | . | . | . | . | . | . | . | ||||
| Dingy Skipper | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | . | . | . | . | 3 | 1 | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 13 | 10 | 4 | 3 | 2 | ||||
| Brimstone | . | 1 | 17 | 2 | 11 | . | 2 | 7 | 2 | . | . | 4 | 4 | 2 | 10 | 1 | 12 | 24 | 7 | 11 | . | . | ||||
| Large White | . | . | 2 | . | 3 | 2 | 3 | 2 | 3 | . | . | . | . | 5 | 9 | 10 | 36 | 7 | 11 | . | 2 | . | ||||
| Small White | . | . | . | 2 | 3 | . | . | 2 | . | . | . | . | . | . | 34 | 81 | 58 | 52 | 34 | 28 | 15 | 1 | ||||
| Green-veined White | . | . | . | . | 1 | 4 | . | 2 | 1 | . | . | . | . | . | 14 | 3 | 4 | 1 | . | 2 | . | 4 | ||||
| Orange Tip | . | . | 8 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brown Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | ||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 3 | . | . | . | . | . | ||||
| Small Copper | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | 4 | 11 | 17 | 18 | 5 | 15 | 21 | 37 | ||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | 1 | . | . | ||||
| Common Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 10 | 30 | 25 | 14 | 4 | 2 | ||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 1 | . | . | 1 | . | . | . | . | . | ||||
| Red Admiral | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 4 | 1 | . | 1 | 3 | 1 | ||||
| Painted Lady | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 4 | 14 | 9 | 11 | 13 | 3 | 2 | . | ||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 2 | 3 | 3 | 27 | 45 | 35 | 9 | 9 | 15 | ||||
| Peacock | 7 | 11 | 6 | . | 2 | . | 1 | 2 | 1 | . | . | 1 | . | . | 22 | 57 | 77 | 36 | 18 | 14 | . | . | ||||
| Comma | . | 2 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | ||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | 4 | 22 | 30 | 19 | 14 | 34 | 12 | 4 | 2 | . | . | ||||
| Marsh Fritillary | . | . | . | . | . | 15 | 91 | 93 | 81 | 33 | 15 | . | . | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | . | 3 | 5 | 1 | 1 | 2 | 1 | 15 | 9 | 9 | 1 | 2 | . | . | 4 | 10 | 29 | 59 | 31 | 18 | 24 | 5 | ||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | . | . | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 51 | 59 | 90 | 33 | 1 | . | . | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 2 | 9 | 120 | 184 | 134 | 104 | 31 | 20 | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 4 | 50 | 145 | 164 | 120 | 88 | 28 | 18 | 6 | 7 | 2 | . | . | ||||
| Small Heath | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 20 | 191 | 121 | 103 | 19 | 7 | . | . | . | . | . | . | ||||