
| 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 | NI | . | . | . | . | . | 1 | . | . | 5 | 9 | 10 | . | 4 | 4 | 9 | . | . | . | . | . | . | |||||
| Large Skipper | NI | . | . | . | . | . | . | . | 11 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | NI | . | . | . | . | 3 | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | NI | . | . | . | . | 3 | 5 | 1 | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | . | . | . | . | |||||
| Brimstone | NI | . | 2 | . | 14 | 14 | 18 | . | 12 | 1 | . | . | . | . | 3 | 17 | 1 | . | . | 2 | . | . | |||||
| Large White | 52 | . | . | . | . | . | . | . | . | . | . | 3 | . | 2 | 3 | 13 | 4 | 3 | 4 | 5 | . | . | |||||
| Small White | 347 | . | . | 1 | 6 | 10 | 10 | . | 8 | 1 | 3 | 4 | 8 | 13 | 19 | 63 | 13 | 14 | 18 | 25 | 26 | 17 | |||||
| Green-veined White | 1 | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | 1 | . | . | |||||
| Green Hairstreak | NI | . | . | . | . | 3 | 3 | 1 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | NI | . | . | . | . | 6 | 3 | 1 | 5 | . | . | 2 | 2 | . | . | 2 | 2 | 4 | 3 | 3 | 4 | 3 | |||||
| Small Blue | 86 | . | . | . | . | . | 14 | 11 | 15 | 15 | 5 | 2 | 1 | 1 | 4 | 15 | 4 | 3 | 2 | . | . | . | |||||
| Brown Argus | 42 | . | . | . | . | . | 1 | 1 | 2 | 2 | 1 | . | . | . | 8 | 5 | 5 | . | . | 6 | . | . | |||||
| Common Blue | 270 | . | . | . | . | . | 7 | 1 | 30 | 36 | 24 | 2 | . | 1 | 1 | 9 | 32 | 25 | 11 | 26 | 5 | 4 | |||||
| Chalk-hill Blue | 14 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 6 | 1 | 1 | . | . | . | |||||
| Adonis Blue | 94 | . | . | . | . | . | 1 | 10 | 12 | 6 | 4 | . | . | . | . | 2 | 6 | 15 | 14 | 4 | 6 | 5 | |||||
| Holly Blue | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Red Admiral | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | . | 1 | |||||
| Painted Lady | 9 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | 2 | 1 | 2 | . | . | |||||
| Small Tortoiseshell | NI | 3 | 8 | 10 | 2 | 7 | . | . | . | 1 | 2 | 10 | 1 | 3 | . | . | . | 1 | 2 | 6 | 2 | 1 | |||||
| Peacock | NI | . | . | . | 1 | 3 | 2 | 1 | 2 | . | . | . | . | . | 2 | 4 | . | . | 2 | 1 | . | . | |||||
| Dark Green Fritillary | NI | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | 1 | . | . | . | . | . | . | |||||
| Marbled White | NI | . | . | . | . | . | . | . | . | 3 | 43 | 14 | 15 | 15 | 17 | 13 | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 70 | . | . | . | . | . | . | . | . | . | . | 2 | . | 4 | 26 | 19 | 3 | 1 | 1 | . | . | . | |||||
| Meadow Brown | NI | . | . | . | . | . | . | . | . | . | 6 | 30 | 5 | 19 | 17 | 40 | 38 | 33 | 12 | 2 | 2 | . | |||||
| Small Heath | 44 | . | . | . | . | 1 | 7 | 4 | 6 | 9 | 6 | . | . | . | . | . | 5 | 4 | 2 | 1 | . | . | |||||
| Ringlet | NI | . | . | . | . | . | . | . | . | . | . | 6 | 3 | 2 | . | . | . | . | . | . | . | . | |||||