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Order: Passeriformes Family: Parulidae Chick Type: Altricial Yellow-rumped Warblers breed in Canada and the western half of the U.S. They migrate each year to wintering grounds in the southern half of the United States and into Central America. Cup style nests are usually built on conifer trees. These nests could be as low as 4 feet high. Average clutch sizes around 3 to 5 are typical. Eggs are incubated for alittle less than two weeks and the chicks will fledge after 14 days. Diet consists of a broad range of insects, spiders and fruits. Yellow-rumps are unique among warblers, their digestive systems can handle an insectivorous, seed and fruit diets. This unique adaptation allows this warbler species to winter as far north as Ohio. During winter and migration their diet is heavily seed and fruit based. This species is often seen at feeders during the winter. Breeding habitat consists of coniferous forests; winter habitat can be open woodlots to forest edges. Yellow-rumps are very common in urban green spaces across the southern U.S. during winter months. The yellow patch on its lower back is an easy field mark for identifying this species, giving it its humorous nickname, "Butter Butt!" There are four subspecies of Yellow-rumped Warblers; the two that are found in the U.S. are the Myrtle Warbler and Audubon's Warbler. The Northwest Mexican Black-fronted Warbler and the Goldman's Warbler are found in Central America.
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