Our collaborative work on warblers is primarily led by Dr. David Toews and his group at Pennsylvania State University as a part of their research on the diversification in the New World wood warblers.

Both the male and female Prothonotary Warbler are bright yellow in color, but the male is noticeably brighter. These birds breed mostly in hardwood wetlands, usually in flood planes of major river ...

This is a large, colorful vireo and a strong ... Unlike other vireos, but compare with pine warbler, with which it is confused, particularly in winter. Pine warbler has a greenish yellow rump ...