Betsy Bloom/Daily News photo

A male yellow-rumped warbler shows how it got its name — and also why it’s nicknamed “butterbutt.” The yellow-rumped is considered the most common and widespread warbler in North America, ranging from Central America to Alaska and Canada. While warblers tend to be among the later migrants, the yellow-rumped usually appears with the early waves in spring and are among the last to leave in fall. Its ability to digest the wax coating on berries such as bayberry is thought to allow it to winter much farther north than other warbler species. They also favor the north woods for nesting. Friday had numerous warbler species singing at Six Mile Lake, but this was the only one cooperative enough to photograph.