Chas Holt, Kim Wallis, Maurice Durham, Graham Ekins, Richard Hearn and Roy King


The long-term data collected at Abberton Reservoir owe much to the dedicated efforts of many volunteer ornithologists, ringers and duck counters. The contemporary UK waterbird data and trends referred to in this paper are collated by the Wetland Bird Survey, a partnership between BTO, RSPB and JNCC,


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