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Essex Skipper: 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 | ||||||||||||||||||||||||||
| Lullington Heath | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | ||||
| Castle Hill | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 18 | 14 | 12 | 5 | 3 | 6 | . | . | . | ||
| Martin Down | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Wye & Crundale Down | . | . | . | . | . | . | . | . | . | . | 1 | 45 | 63 | 17 | 12 | 3 | . | |||||||||
| Pickett Wood | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 5 | 2 | 1 | . | . | . | . | . | |||||
| Northward Hill | . | . | . | . | . | . | . | . | . | 8 | 18 | 13 | 18 | 8 | 2 | 2 | . | . | . | . | ||||||
| Hampstead Heath | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||
| Aston Rowant (S) | . | . | . | . | . | . | . | . | . | 4 | . | 9 | . | . | . | . | . | . | ||||||||
| Aston Rowant (N) | . | . | . | . | . | . | . | 1 | 1 | . | ||||||||||||||||
| Woodwalton Fen | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | ||||||
| Weeting Heath | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 7 | 12 | 4 | 8 | 2 | . | . | . | ||||
| Bure Marshes | . | . | . | . | . | . | . | 4 | 4 | 3 | 3 | . | . | . | . | . | . | . | . | |||||||
