
| 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 | 18 | 2 | 32 | 20 | 17 | . | . | . | . | . | ||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Large Skipper | 80 | . | . | . | . | . | . | 7 | 18 | 15 | 7 | 11 | 8 | 3 | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | NI | . | . | . | . | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 2 | . | . | ||||||
| Brimstone | NI | 4 | 8 | 11 | 7 | 3 | . | . | . | . | . | . | 2 | 5 | . | 4 | 2 | 1 | 15 | . | . | ||||||
| Large White | 12 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | 1 | 1 | . | . | . | . | ||||||
| Small White | 40 | . | . | . | . | . | . | . | 1 | . | 2 | . | 3 | 4 | 2 | . | 9 | 16 | 8 | 1 | 1 | ||||||
| Green-veined White | 8 | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 2 | 4 | 2 | . | 1 | . | . | . | ||||||
| Purple Hairstreak | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||
| Small Copper | 44 | . | . | . | 3 | 1 | 2 | 1 | 1 | . | . | . | . | 1 | 1 | 3 | 6 | 5 | 3 | . | . | ||||||
| Brown Argus | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | ||||||
| Common Blue | 25 | . | . | . | . | . | . | 2 | 2 | 2 | 1 | 1 | . | . | 2 | 2 | 1 | 4 | . | . | . | ||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| White Admiral | 28 | . | . | . | . | . | . | . | . | . | 3 | 6 | 2 | 1 | . | . | . | . | . | . | . | ||||||
| Purple Emperor | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Red Admiral | NI | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | 1 | . | . | . | ||||||
| Painted Lady | 9 | . | . | . | . | 1 | . | . | 2 | . | . | . | . | . | . | . | 2 | 2 | 1 | . | . | ||||||
| Small Tortoiseshell | 5 | . | . | 1 | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | 1 | . | . | ||||||
| Peacock | NI | 1 | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Comma | NI | . | 1 | . | 1 | . | . | . | . | . | 3 | . | . | . | . | . | . | 1 | 1 | 3 | 2 | ||||||
| Small Pearl-bordered Fritillary | 8 | . | . | . | . | . | . | 2 | 3 | 4 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Pearl-bordered Fritillary | NI | . | . | . | 8 | 5 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Dark Green Fritillary | 13 | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 2 | 1 | . | . | . | . | . | ||||||
| Silver-washed Fritillary | 93 | . | . | . | . | . | . | . | . | 1 | 23 | 11 | 4 | 20 | 1 | 11 | . | 1 | . | . | . | ||||||
| Marsh Fritillary | NI | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Speckled Wood | 92 | . | . | . | 1 | 1 | 1 | 2 | 5 | . | 2 | 4 | . | 2 | 5 | 3 | 12 | 6 | 8 | 3 | 2 | ||||||
| Marbled White | 74 | . | . | . | . | . | . | . | . | 1 | 6 | 12 | 5 | 7 | 6 | 5 | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | 411 | . | . | . | . | . | . | . | . | . | . | . | 4 | 46 | 61 | 116 | . | . | . | . | . | ||||||
| Meadow Brown | 306 | . | . | . | . | . | . | 2 | 3 | 12 | 9 | 47 | 9 | 17 | 23 | 15 | 6 | 1 | 3 | . | . | ||||||
| Small Heath | 13 | . | . | . | . | . | . | 3 | 2 | 1 | . | . | . | . | 1 | . | . | . | 1 | . | . | ||||||
| Ringlet | 262 | . | . | . | . | . | . | . | . | 10 | 36 | 56 | 46 | 25 | 3 | 1 | . | . | . | . | . | ||||||
| Six-spot Burnet | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Argent & Sable | NI | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Mother Shipton | NI | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Burnet Companion | NI | . | . | . | . | . | 2 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||