
| 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 | . | . | . | 2 | 3 | 11 | 20 | 2 | 3 | 1 | . | . | . | . | . | . | . | |||||||||
| Large Skipper | NI | . | . | . | . | 1 | 4 | 5 | 3 | 5 | . | . | . | . | . | . | . | . | |||||||||
| Brimstone | 3 | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | |||||||||
| Large White | 32 | . | . | . | . | . | . | 3 | 10 | 7 | 4 | 3 | . | . | . | 1 | . | . | |||||||||
| Small White | 50 | . | 1 | . | . | . | . | 9 | 14 | 5 | 6 | 2 | . | 1 | . | 1 | . | . | |||||||||
| Green-veined White | NI | 2 | 3 | . | . | . | . | . | . | 1 | 2 | 1 | . | . | . | . | . | . | |||||||||
| Orange Tip | NI | 5 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brown Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||||||||
| Small Copper | 8 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 3 | 1 | 3 | . | |||||||||
| Common Blue | 46 | . | . | . | 1 | . | . | . | 4 | 5 | 12 | 12 | 3 | 3 | 1 | . | . | . | |||||||||
| Holly Blue | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||||||
| Red Admiral | 5 | . | . | . | . | . | . | 1 | 1 | . | . | 1 | . | . | . | . | . | 1 | |||||||||
| Painted Lady | 10 | . | . | . | . | 1 | . | . | 5 | 2 | 2 | . | . | . | . | . | . | . | |||||||||
| Peacock | NI | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | |||||||||
| Comma | 9 | . | 1 | . | . | . | . | 1 | 2 | 2 | . | . | . | 1 | . | . | . | . | |||||||||
| Silver-washed Fritillary | 19 | . | . | . | . | . | . | 5 | 3 | 2 | 3 | . | . | . | . | . | . | . | |||||||||
| Speckled Wood | 137 | 4 | 3 | . | 8 | 1 | 5 | 5 | 6 | 6 | 4 | 25 | 15 | 17 | 8 | 4 | 2 | 2 | |||||||||
| Gatekeeper / Hedge Brown | 374 | . | . | . | . | . | . | 70 | 150 | 61 | 26 | 4 | . | . | . | . | . | . | |||||||||
| Meadow Brown | NI | . | . | . | . | 2 | 41 | 101 | 87 | 28 | 11 | 2 | . | . | . | . | . | . | |||||||||
| Small Heath | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||||
| Ringlet | NI | . | . | . | . | . | . | 18 | 1 | 5 | . | . | . | . | . | . | . | . | |||||||||