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Yellow-footed Honeyguide was created in 1981.
Yellow-rumped Cacique was created in 1758.
Yellow-rumped Thornbill was created in 1830.
The yellow rumped warbler breeds in the Northern U.S. and Canada, and winters in the Southern U.S. and Mexico.
The four subspecies were almost identical in dna, and the classification under yellow rumped became the standard for this Dendroica warbler.