Abstract In Shetland, wintering Slavonian Grebes Podiceps auritus occupy sheltered voes and feed in water depths of less than 20 m over muddy and sandy sediments. Systematic counts found that the wintering population in the islands doubled from just under 100 individuals in 2000/01 to just over 200 in 2011/12; and there is good evidence to assume that it has quadrupled in the past 30 years.

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