
| 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 | NI | . | . | . | . | . | . | . | . | . | 9 | 22 | 48 | 35 | 21 | 3 | . | . | . | . | . | . | |||||
| Large Skipper | 42 | . | . | . | . | . | 4 | 4 | 6 | 8 | 10 | 3 | 4 | 1 | 2 | . | . | . | . | . | . | . | |||||
| Dingy Skipper | 17 | . | . | . | . | 4 | 8 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 29 | . | . | 2 | 1 | . | . | . | . | . | . | . | 9 | 8 | 5 | 3 | 1 | . | . | . | . | . | |||||
| Large White | 31 | . | . | . | . | . | 1 | . | 2 | . | 3 | . | 4 | 4 | 9 | 3 | 1 | 1 | . | . | . | 3 | |||||
| Small White | 45 | . | . | . | . | 1 | 2 | 2 | 1 | . | . | 2 | 7 | 6 | 10 | 4 | 2 | 5 | . | 1 | . | 2 | |||||
| Green-veined White | 2 | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||
| Orange Tip | 3 | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | 4 | . | . | . | . | 1 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | 12 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | . | 2 | 2 | 2 | 2 | |||||
| Small Blue | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| Brown Argus | 49 | . | . | . | . | 2 | 1 | . | . | . | . | . | 2 | 5 | 11 | 5 | 13 | 10 | . | . | . | . | |||||
| Common Blue | 196 | . | . | . | . | 9 | 13 | 3 | 6 | . | 1 | . | 3 | 27 | 19 | 29 | 33 | 16 | 4 | 17 | 16 | . | |||||
| Chalk-hill Blue | 34 | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | 8 | 11 | 9 | 1 | . | 1 | . | |||||
| Adonis Blue | 32 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 12 | 17 | 1 | 1 | . | . | |||||
| Holly Blue | 11 | . | . | 1 | 3 | 1 | . | . | . | . | . | 1 | 3 | 2 | . | . | . | . | . | . | . | . | |||||
| Red Admiral | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| Small Tortoiseshell | 8 | . | . | 1 | . | . | . | . | . | . | 5 | 1 | . | . | . | 1 | . | . | . | . | . | . | |||||
| Peacock | NI | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Comma | 5 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | 2 | 1 | |||||
| Silver-washed Fritillary | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | 17 | . | . | . | 2 | 2 | . | 1 | 1 | 1 | 1 | . | . | 1 | 1 | . | 2 | 1 | 1 | 2 | . | . | |||||
| Marbled White | 29 | . | . | . | . | . | . | . | . | 1 | 15 | 8 | 4 | 1 | . | . | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 151 | . | . | . | . | . | . | . | . | . | . | 5 | 19 | 36 | 42 | 37 | 8 | 3 | 1 | . | . | . | |||||
| Meadow Brown | 514 | . | . | . | . | . | . | 2 | 4 | 30 | 45 | 33 | 82 | 81 | 83 | 67 | 46 | 26 | 10 | 4 | 1 | . | |||||
| Small Heath | 123 | . | . | . | . | 19 | 10 | 4 | 3 | 7 | 1 | . | . | 1 | 11 | 23 | 20 | 9 | 6 | 6 | 2 | . | |||||
| Ringlet | 29 | . | . | . | . | . | . | . | . | . | 16 | 9 | 3 | 1 | . | . | . | . | . | . | . | . | |||||
| Five-spot Burnet | NI | . | . | . | . | 39 | . | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||