
| 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 | 145 | . | . | . | . | . | . | . | . | 2 | 11 | 2 | 32 | 19 | 17 | . | . | . | . | ||||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | 0.5 | . | . | . | . | . | ||||||||
| Silver-spotted Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | 0.5 | . | . | . | . | . | ||||||||
| Large Skipper | 80 | . | . | . | . | . | . | 7 | 18 | 15 | 7 | 8 | 3 | 5.5 | . | . | . | . | . | ||||||||
| Grizzled Skipper | 6 | . | . | . | . | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Clouded Yellow | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | . | . | ||||||||
| Brimstone | NI | 4 | 8 | 11 | 7 | 3 | . | . | . | . | . | 2 | 5 | . | 4 | 2 | 8 | . | . | ||||||||
| Large White | 12 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | ||||||||
| Small White | 40 | . | . | . | . | . | . | . | 1 | . | 2 | 3 | 4 | 1 | . | 9 | 20 | 1 | 1 | ||||||||
| Green-veined White | 8 | . | . | . | 1 | . | . | . | . | . | . | 1 | 2 | 2 | 2 | . | 1 | . | . | ||||||||
| Purple Hairstreak | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||||
| Small Copper | 44 | . | . | . | 3 | 1 | 2 | 1 | 1 | . | . | . | 1 | 0.5 | 3 | 6 | 6 | . | . | ||||||||
| Brown Argus | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | ||||||||
| Common Blue | 25 | . | . | . | . | . | . | 2 | 2 | 2 | 1 | . | . | 1.5 | 2 | 1 | 4 | . | . | ||||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 0.5 | . | . | . | . | . | ||||||||
| White Admiral | 28 | . | . | . | . | . | . | . | . | . | 3 | 2 | 1 | 3 | . | . | . | . | . | ||||||||
| Purple Emperor | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| Red Admiral | 6 | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | 1 | . | . | ||||||||
| Painted Lady | 9 | . | . | . | . | 1 | . | . | 2 | . | . | . | . | . | . | 2 | 2 | . | . | ||||||||
| Small Tortoiseshell | 5 | . | . | 1 | . | . | . | . | . | . | 1 | 1 | . | 0.5 | . | . | 1 | . | . | ||||||||
| Peacock | NI | 1 | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Comma | 16 | . | 1 | . | 1 | . | . | . | . | . | 3 | . | . | . | . | . | 2 | 3 | 2 | ||||||||
| Small Pearl-bordered Fritillary | 8 | . | . | . | . | . | . | 2 | 3 | 4 | . | . | . | . | . | . | . | . | . | ||||||||
| Pearl-bordered Fritillary | 21 | . | . | . | 8 | 5 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Dark Green Fritillary | 13 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | ||||||||
| Silver-washed Fritillary | 93 | . | . | . | . | . | . | . | . | 1 | 23 | 4 | 20 | 6 | 11 | . | 1 | . | . | ||||||||
| Marsh Fritillary | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | 92 | . | . | . | 1 | 1 | 1 | 2 | 5 | . | 2 | . | 2 | 4.5 | 3 | 12 | 10 | 3 | 2 | ||||||||
| Marbled White | 74 | . | . | . | . | . | . | . | . | 1 | 6 | 5 | 7 | 9 | 5 | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | 411 | . | . | . | . | . | . | . | . | . | . | 4 | 46 | 30.5 | 116 | . | . | . | . | ||||||||
| Meadow Brown | 306 | . | . | . | . | . | . | 2 | 3 | 12 | 9 | 9 | 17 | 35 | 15 | 6 | 4 | . | . | ||||||||
| Small Heath | 13 | . | . | . | . | . | . | 3 | 2 | 1 | . | . | . | 0.5 | . | . | 1 | . | . | ||||||||
| Ringlet | 262 | . | . | . | . | . | . | . | . | 10 | 36 | 46 | 25 | 29.5 | 1 | . | . | . | . | ||||||||
| Six-spot Burnet | NI | . | . | . | . | . | . | . | . | . | . | . | . | 0.5 | . | . | . | . | . | ||||||||
| Argent & Sable | NI | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Mother Shipton | NI | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Burnet Companion | NI | . | . | . | . | . | 2 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | ||||||||