GEOGRAPHIC VARIATION AND TAXONOMY OF THE NORTHERN WATERTHRUSH

摘要

In this study we analyzed geographic variation in the Northern Waterthrush (Seiurus nove- boracensis) and reassessed the status of the four subspecies described between 1880 and 1948, three of which were recognized by the AOU Check-list (1957) and Godfrey (1986). We examined 490 specimens that came from throughout the breeding range of the Northern Waterthrush and used four morphometric data sets and three color variables to investigate geographic variation. Males differed from females based on morphometric char- acters. Males, unlike females, showed a moprphometric trend with latitude and longitude.