DENSITY INFLUENCES CENSUS TECHNIQUE ACCURACY FOR CERULEAN WARBLERS IN EASTERN ONTARIO

摘要

This study investigated the accuracy of 50-m fixed-radius, 100-m fixed-radius, and variable circular-plot point counts to estimate the actual density of breeding Cerulean War- blers (Dendroica cerulea) during the 1997 and 1998 breeding seasons, in Ontario, Canada. Density estimates were compared to actual densities as measured from intensive field obser- Vation of pairing and nesting behavior.