Split Decision:
Yellow-rumped Warbler The Yellow-rumped Warbler is one of the most widespread and well-known warblers in North America. Birders affectionately refer to this species as "butter-butt," since its bright yellow rump is an eye-catching and diagnostic field mark throughout the year.
Adults also have a yellow crown patch, most obvious in adult males. This bird's species name, coronata, means crowned.
Like another familiar bird, the Dark-eyed Junco, the Yellow-rumped Warbler occurs in several distinctive forms. Could it actually be three, possibly four, separate species? | |
