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First-year male: black throat and eye-line
Breeds from southern British Columbia, southern Saskatchewan, Montana, and southwestern North Dakota south to western Texas and northern Mexico. Winters in Mexico south to Costa Rica. Accidental vagrant in the eastern United States and Venezuela.
The Bullock's Oriole was once combined with the eastern counterpart Baltimore Oriole as a single species, the Northern Oriole, because they began to interbreed on the Great Plains, when the two forms extended their ranges and met. This is in spite of these two forms not being each others closest relatives.
Two subspecies are recognized:
Riparian, creek willow and cottonwood, scrub and cactus, Chaparral, mixed oak and pine woodlands.
The diet includes insects, berries and nectar.
The nest, located in a tree, is a pendulous basket, made from hair, twine, grass, and wool, lined with plant-down, hair, or feathers and suspended from a thin branch, overhanging over water. The 4 to 5 eggs are incubated by the female for about 11 days; the young fledge about 14 days later.
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