Monitoring and Prediction of the Fall Flight of Wood Ducks ('AIX SPONSA') in Michigan: An Investigation of Survey Methods.

摘要

Direct estimates of wood duck (Aix sponsa) numbers and production are difficult to derive and improved methods are needed to estimate fall flight. The goal of this project is to evaluate survey methods that might provide a finer scale of monitoring wood duck numbers and production and that correlate with estimates derived from the traditional analyses of harvest surveys. In 1994, night surveys for wood duck broods were conducted in 1995 and 1996. Twenty-one surveys were conducted in 1997 and 1998. The road surveys were conducted in early and late time periods. Over 700 nest boxes were checked at 11 sites in 1995 and 1996.