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Bure Marshes: Counts for the year 1981
| 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 | ||||||||||||||||||||||||||
| Essex Skipper | . | . | . | . | . | . | . | 4 | 4 | 3 | 3 | . | . | . | . | . | . | . | . | |||||||
| Swallowtail | . | . | . | . | 1 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | . | 5 | 5 | 5 | 11 | 9 | 4 | 1 | . | . | . | 6 | 7 | 5 | 4 | 1 | . | . | . | |||||||
| Large White | . | . | . | . | . | . | 3 | . | 3 | 11 | 3 | 3 | 2 | . | . | . | . | . | . | |||||||
| Small White | . | . | . | . | 1 | 2 | 1 | . | 1 | . | 7 | 3 | . | . | . | . | . | . | . | |||||||
| Green-veined White | . | 9 | 7 | 12 | 9 | 11 | 4 | . | 1 | 5 | 12 | 13 | 12 | 15 | 2 | 3 | 1 | . | . | |||||||
| Orange Tip | . | 4 | 3 | 1 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||||||
| Peacock | . | . | 1 | 2 | . | . | . | . | . | . | . | 5 | 5 | 5 | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 1 | 3 | 1 | 4 | . | . | . | . | . | . | |||||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | . | 1 | 3 | . | . | . | . | . | . | . | . | |||||||
| Ringlet | . | . | . | . | . | . | . | 5 | 10 | 4 | 7 | 4 | . | . | . | . | . | . | . | |||||||
