
| 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 | . | . | . | . | . | . | . | . | 53 | 104 | 66 | 13 | 34 | 40 | 11 | 2 | 1 | . | ||||||||
| Large Skipper | NI | . | . | . | . | . | 7 | 14 | 14 | 59 | 22 | 14 | . | 2 | 1 | 1 | . | . | . | ||||||||
| Brimstone | NI | 6 | 1 | 2 | 7 | 4 | . | . | . | . | . | 5 | 5 | 1 | 23 | 20 | 17 | 1 | . | ||||||||
| Large White | NI | . | . | . | 1 | 4 | . | . | . | 2 | 12 | 15 | 11 | 24 | 27 | 13 | 5 | 4 | . | ||||||||
| Small White | NI | . | 2 | 3 | 3 | 2 | . | . | . | . | 4 | 6 | 13 | 20 | 30 | 13 | 15 | . | . | ||||||||
| Green-veined White | NI | . | 4 | 8 | 8 | 9 | . | . | . | 4 | 7 | 27 | 16 | 16 | 23 | 11 | 17 | 1 | . | ||||||||
| Orange Tip | NI | 8 | 9 | 8 | 2 | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | NI | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | NI | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | 2 | . | 1 | . | 1 | ||||||||
| Common Blue | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | ||||||||
| Holly Blue | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | ||||||||
| Red Admiral | NI | . | . | . | 2 | . | 1 | 1 | . | . | . | 1 | 2 | 1 | . | . | . | . | 3 | ||||||||
| Small Tortoiseshell | NI | 2 | . | 1 | . | . | . | 2 | . | 2 | 5 | 4 | 1 | 1 | 3 | 1 | . | 2 | . | ||||||||
| Peacock | NI | 2 | 6 | 5 | 5 | 3 | . | . | . | . | . | 7 | 24 | 87 | 136 | 76 | 3 | . | . | ||||||||
| Comma | NI | 1 | 2 | . | . | 1 | . | . | . | 1 | 4 | 2 | . | 2 | 1 | 1 | . | . | 1 | ||||||||
| Silver-washed Fritillary | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||||
| Marsh Fritillary | NI | . | . | . | 6 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | NI | 1 | 7 | 1 | . | . | . | 3 | 1 | 1 | 1 | 1 | 4 | 7 | 5 | 9 | 7 | 6 | 2 | ||||||||
| Marbled White | NI | . | . | . | . | . | . | . | . | 11 | 12 | 10 | . | 4 | . | . | . | . | . | ||||||||
| Grayling | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | ||||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | 14 | 58 | 57 | 62 | 128 | 79 | 22 | . | . | ||||||||
| Meadow Brown | NI | . | . | . | . | . | 2 | 2 | 15 | 76 | 75 | 96 | 65 | 38 | 44 | 55 | 25 | 3 | . | ||||||||
| Small Heath | NI | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | ||||||||
| Ringlet | NI | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||||||
| Mother Shipton | NI | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||