The Yellow-rumped Warbler is the most abundant and widespread warbler in North America, nicknamed 'butter butt' for its distinctive yellow rump patch that flashes in flight. It is unusually cold-tolerant for a warbler because it can digest wax in bayberries, allowing it to winter farther north than any other warbler. Two subspecies — the 'Myrtle' of the East and 'Audubon's' of the West — were once considered separate species.
Habitat
Conifer forests in summer; shrublands and coasts in winter
Diet
Insects in summer; bayberries, wax myrtle, and berries in winter
How common
Common
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