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Essex Skipper: Counts for the year 1987
| 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 | . | . | . | . | . | |||||||
| Castle Hill | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 8 | 5 | 5 | 2 | . | 1 | . | . | . | |
| Ham Street Wood | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 7 | 4 | 8 | 1 | 1 | . | . | . | . | . | |||
| Burnt Oak Wood | . | . | . | . | . | . | . | . | . | . | . | 8 | 4 | . | 2 | 2 | . | . | . | . | . | |||||
| Folkestone Escarpment | . | . | . | . | . | . | 17 | 8 | . | 3 | 3 | 1 | 1 | . | . | . | ||||||||||
| Upton Cow Down (MOD) | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | |||||||
| RSPB Blean Woods | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | 1 | . | . | . | . | . | |
| Northward Hill | . | . | . | . | . | . | . | . | 4 | 11 | 1 | . | . | . | . | . | . | |||||||||
| Leigh Marshes | . | . | . | . | . | . | . | . | . | . | . | . | 73 | 43 | 6 | 28 | 46 | 31 | 30 | 8 | . | 1 | . | . | ||
| Fryent Country Park | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Gomm Valley | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||||
| St Osyth | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 17 | 20 | 28 | 7 | 5 | 2 | . | . | . | . | |||
| Wicken Fen | . | . | . | . | . | . | . | . | 1 | 1 | . | 4 | 3 | 2 | . | 1 | . | . | ||||||||
| Woodwalton Fen | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||||
| Weeting Heath | . | . | . | . | . | . | 1 | 1 | 3 | 2 | . | . | . | . | ||||||||||||
| Holme Dunes | . | . | . | . | . | . | 4 | . | 1 | 1 | ||||||||||||||||
| Gibralter Point | . | . | . | . | . | . | . | . | . | 20 | . | 6 | . | . | . | . | . | |||||||||
