Yellow-rumped Warbler

For many years, the "Myrtle Warbler" of the East and the "Audubon's Warbler" of the
West were treated as separate species, but today they are known to be subspecies of
the Yellow-rumped Warbler, Canada's most common warbler. Both subspecies can be
seen in the city during migration, although the "Audubon's" race is the form that most
commonly nests here. The most simple way to distinguish between the two races is to
look at the throat—the "Audubon's" race has a yellow throat in all plumages, and the
"Myrtle" race has a white throat in all plumages.
Unlike most of our warblers, the Yellow-rumped Warbler overwinters here in small
numbers, particularly around moist shoreline areas. During the summer months, it
feeds on small insects; in winter, it eats small berries.

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