
| 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 | 170 | . | . | . | . | . | . | . | 9 | 15 | 21 | 75 | 11 | . | . | . | . | . | |||||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | 1 | 24 | 7 | 7 | . | . | . | . | . | |||||||||
| Large Skipper | 44 | . | . | . | . | 8 | 16 | 3 | 9 | 6 | 2 | . | . | . | . | . | . | . | |||||||||
| Dingy Skipper | 39 | . | . | . | 6 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | 15 | . | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Clouded Yellow | 37 | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 7 | 6 | 8 | 8 | 4 | |||||||||
| Brimstone | 31 | 5 | 2 | 3 | . | . | . | . | . | . | 1 | 1 | . | 4 | . | 2 | 1 | . | |||||||||
| Large White | 120 | . | . | 2 | 2 | . | . | . | . | . | 7 | 7 | 21 | 29 | 11 | 26 | 12 | 2 | |||||||||
| Small White | 128 | . | . | 5 | . | . | . | . | . | . | . | 2 | 5 | 40 | 23 | 30 | 10 | 6 | |||||||||
| Green-veined White | 6 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 3 | 2 | . | |||||||||
| Orange Tip | 4 | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Green Hairstreak | 8 | . | . | 1 | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | 107 | . | 1 | 12 | . | . | . | . | . | . | 4 | 1 | 14 | 9 | 17 | 7 | 10 | . | |||||||||
| Small Blue | 5 | . | . | . | . | 2 | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||||
| Brown Argus | 153 | . | . | . | 4 | 5 | 3 | . | . | . | 2 | 19 | 29 | 17 | 8 | 26 | 12 | 1 | |||||||||
| Common Blue | 1176 | . | . | . | 24 | 39 | 30 | 15 | 16 | 22 | 3 | 17 | 87 | 435 | 285 | 114 | 56 | 8 | |||||||||
| Chalk-hill Blue | 194 | . | . | . | . | . | . | . | . | 2 | 5 | 33 | 48 | 56 | 16 | 15 | 7 | 2 | |||||||||
| Adonis Blue | 36 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 12 | 9 | 8 | 2 | |||||||||
| Red Admiral | 11 | . | 1 | 1 | . | . | 1 | . | . | . | . | . | . | 2 | 2 | 3 | . | . | |||||||||
| Painted Lady | 105 | . | . | . | 3 | 3 | 2 | . | . | 5 | 5 | 20 | 6 | 14 | 5 | 20 | 14 | 4 | |||||||||
| Small Tortoiseshell | 167 | 18 | 4 | 11 | . | . | . | . | 1 | 15 | 15 | 4 | . | . | 4 | 13 | 24 | 8 | |||||||||
| Peacock | 58 | 5 | 1 | 5 | . | . | . | . | . | . | . | 1 | 4 | 6 | 5 | 7 | 9 | 1 | |||||||||
| Dark Green Fritillary | 17 | . | . | . | . | . | . | . | . | 14 | . | 2 | 1 | . | . | . | . | . | |||||||||
| Marsh Fritillary | 4 | . | . | . | 3 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Marbled White | 556 | . | . | . | . | . | 20 | 52 | 135 | 197 | 71 | 78 | 3 | . | . | . | . | . | |||||||||
| Gatekeeper / Hedge Brown | 216 | . | . | . | . | . | . | . | . | 17 | 43 | 45 | 42 | 60 | 6 | 3 | . | . | |||||||||
| Meadow Brown | 694 | . | . | . | . | . | 11 | 32 | 60 | 118 | 172 | 129 | 66 | 65 | 22 | 15 | 4 | . | |||||||||
| Small Heath | 426 | . | . | . | 28 | 51 | 48 | 29 | 42 | 14 | 3 | . | 1 | 10 | 51 | 59 | 33 | 8 | |||||||||
| Ringlet | 3 | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | |||||||||