Population Turnover in Groups of Wing-Moulting Waterbirds: The Use of a Natural Marker in Great Crested Grebes

摘要

Recent studies on moulting waterbirds have often recorded the numbers present, but never attempted to quantify the total number of individuals using a site through the period of the moult. This may by far exceed the numbers present at any one time. It should, however, be possible to quantify the turnover by sufficient regular observations. The study sets out to examine the necessary methodology, using great crested grebes (Podiceps cristatus).