
| 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 Skipper | 82 | . | . | . | . | . | . | 5 | 10 | 12 | 15 | 19 | 4 | 1 | . | . | . | . | |||||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | 5 | 6 | 3 | . | 2 | . | . | . | . | |||||||||
| Large Skipper | 97 | . | . | . | 18 | 12 | 16 | 34 | 3 | 1 | . | . | . | . | . | . | . | . | |||||||||
| Dingy Skipper | 90 | . | 6 | 31 | 5 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | 32 | . | 3 | 3 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brimstone | 48 | 2 | 11 | 4 | . | . | . | 1 | . | . | . | . | 3 | . | . | . | . | 4 | |||||||||
| Large White | 135 | . | 3 | 2 | 5 | 1 | . | . | 2 | . | 19 | 18 | 17 | 12 | 19 | 13 | 7 | 4 | |||||||||
| Small White | 369 | 5 | 25 | 42 | 5 | 4 | 9 | 7 | 8 | 13 | 36 | 33 | 23 | 26 | 19 | 21 | 15 | 7 | |||||||||
| Green-veined White | 23 | . | 4 | 3 | . | 1 | . | . | 2 | . | . | 3 | 2 | . | . | . | . | . | |||||||||
| Orange Tip | 31 | . | 16 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Green Hairstreak | 29 | . | 5 | 11 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | 75 | 3 | 17 | 17 | . | . | . | . | . | . | 1 | 2 | 4 | 5 | . | . | . | . | |||||||||
| Small Blue | 46 | . | . | 2 | 8 | 2 | . | 6 | 3 | . | 2 | 1 | 2 | . | . | . | . | . | |||||||||
| Brown Argus | 71 | . | . | 8 | 1 | 2 | . | 2 | . | . | . | 1 | 4 | 6 | 2 | 6 | 3 | . | |||||||||
| Common Blue | 252 | . | . | . | 35 | 28 | 19 | 21 | . | . | 1 | 4 | 6 | 15 | 16 | 23 | 19 | 4 | |||||||||
| Chalk-hill Blue | 114 | . | . | . | . | . | . | . | . | . | 14 | 21 | 45 | 24 | 5 | 3 | 2 | . | |||||||||
| Adonis Blue | 375 | . | . | 90 | 3 | . | . | . | . | . | . | . | 1 | 14 | 27 | 36 | 20 | 1 | |||||||||
| Red Admiral | 8 | . | . | . | . | . | . | . | . | 1 | 3 | 4 | . | . | . | . | . | . | |||||||||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||||||
| Small Tortoiseshell | 149 | 4 | 8 | . | . | . | 2 | 5 | 20 | 43 | 18 | 22 | 4 | . | . | . | . | 2 | |||||||||
| Peacock | 65 | 7 | 2 | . | . | . | . | . | . | . | 7 | 10 | 21 | 1 | 2 | . | . | . | |||||||||
| Dark Green Fritillary | 2 | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | |||||||||
| Marbled White | 1108 | . | . | . | 24 | 44 | 125 | 470 | 275 | 150 | 11 | 9 | . | . | . | . | . | . | |||||||||
| Gatekeeper / Hedge Brown | 190 | . | . | . | . | . | . | . | 1 | 7 | 38 | 54 | 79 | 11 | . | . | . | . | |||||||||
| Meadow Brown | 990 | . | . | . | 10 | 17 | 70 | 280 | 155 | 151 | 72 | 59 | 80 | 42 | 27 | 14 | 9 | 2 | |||||||||
| Small Heath | 287 | . | 7 | 29 | 31 | 30 | 30 | 55 | 16 | 7 | . | . | 1 | . | . | 2 | 2 | . | |||||||||
| Ringlet | 30 | . | . | . | . | . | . | 9 | 11 | 10 | . | . | . | . | . | . | . | . | |||||||||