
| 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 | . | . | . | . | . | . | . | . | . | . | 10 | 45 | 71 | 45 | 17 | 17 | 2 | 1 | . | . | . | |||||
| Essex Skipper | 19 | . | . | . | . | . | . | . | . | . | . | 4 | 4 | 8 | . | 2 | . | . | . | . | . | . | |||||
| Large Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | NI | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | NI | . | . | . | 2 | 5 | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | NI | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | 3 | 1 | 5 | 1 | 1 | 9 | 6 | 3 | |||||
| Brimstone | NI | 3 | 9 | 3 | 6 | 9 | . | 4 | 3 | . | . | . | . | 5 | . | 2 | 16 | 1 | 1 | 2 | . | . | |||||
| Large White | NI | . | . | . | . | 7 | . | 6 | 1 | 3 | . | . | 11 | . | . | 5 | 7 | 7 | 1 | 3 | . | . | |||||
| Small White | NI | 1 | . | . | 2 | 1 | . | 5 | . | . | . | 1 | 2 | 25 | 15 | 32 | 56 | 46 | 8 | . | 9 | . | |||||
| Green-veined White | NI | . | . | . | 7 | 17 | 4 | 10 | 3 | 4 | 2 | 1 | 12 | 22 | . | . | 10 | 8 | 2 | 4 | 2 | . | |||||
| Orange Tip | NI | . | . | . | 1 | 3 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | NI | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Small Copper | NI | . | . | . | 2 | 5 | . | 1 | 1 | 1 | . | . | . | 1 | 3 | 1 | 4 | 1 | . | 2 | 1 | . | |||||
| Brown Argus | NI | . | . | . | . | . | 4 | 4 | 9 | 4 | 1 | . | . | 1 | 1 | 2 | 10 | 2 | 1 | 6 | 2 | 1 | |||||
| Common Blue | NI | . | . | . | . | . | 12 | 29 | 25 | 23 | 11 | . | . | . | 2 | 12 | 19 | 16 | 12 | 9 | 12 | 5 | |||||
| Chalk-hill Blue | NI | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | 7 | 12 | 2 | . | . | 1 | 1 | |||||
| Adonis Blue | NI | . | . | . | . | . | 1 | 13 | 16 | 14 | 1 | . | . | . | . | . | 3 | 4 | 26 | 12 | 6 | 1 | |||||
| Red Admiral | NI | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | 2 | 1 | . | . | . | 1 | . | . | |||||
| Painted Lady | NI | . | . | . | . | . | . | . | . | 5 | . | . | . | . | . | 1 | 1 | 5 | 2 | . | . | . | |||||
| Small Tortoiseshell | NI | 1 | 2 | 4 | 2 | 4 | . | . | . | . | . | 18 | 38 | 35 | 7 | 1 | 2 | 7 | . | 18 | 2 | 3 | |||||
| Peacock | NI | 2 | 8 | 3 | 8 | 5 | . | 1 | 3 | 1 | . | . | . | 4 | 4 | 14 | 4 | 3 | 2 | . | . | . | |||||
| Comma | NI | . | 1 | . | . | . | . | . | . | . | . | 1 | . | 4 | 1 | . | . | . | . | . | . | . | |||||
| Dark Green Fritillary | NI | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | 1 | . | . | . | . | . | . | |||||
| Speckled Wood | NI | . | . | . | 2 | 1 | . | . | 2 | 1 | 1 | . | . | . | 1 | . | 4 | 5 | 4 | 3 | 5 | . | |||||
| Wall Brown | NI | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Marbled White | NI | . | . | . | . | . | . | . | . | . | . | 38 | 35 | 23 | 13 | 4 | 1 | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | 65 | 40 | . | 145 | 28 | 22 | 4 | . | . | . | . | |||||
| Meadow Brown | NI | . | . | . | . | . | . | . | . | . | 2 | 1 | 179 | 156 | . | 126 | 101 | 52 | 26 | 16 | 3 | 1 | |||||
| Small Heath | NI | . | . | . | . | 2 | . | 3 | 6 | 11 | 13 | 5 | 9 | 8 | 3 | . | 1 | . | 1 | 3 | . | . | |||||
| Ringlet | NI | . | . | . | . | . | . | . | . | . | . | 39 | 21 | 19 | 5 | 2 | . | . | . | . | . | . | |||||