Bullock’s Oriole
Bullock's Oriole
Icterus bullockii
At a Glance
In the west, this oriole is common in summer in forest edge, farmyards, leafy suburbs, isolated groves, and streamside woods, especially in cottonwood trees. For several years it was considered to belong to the same species as the eastern Baltimore Oriole (with the two combined under the name Northern Oriole), because the two often interbreed where their ranges come in contact on the western Great Plains. The habits of the two are similar.
All bird guide text and rangemaps adapted from by Kenn Kaufman漏 1996, used by permission of Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Category
Blackbirds and Orioles, Perching Birds
IUCN Status
Least Concern
Habitat
Forests and Woodlands, Shrublands, Savannas, and Thickets, Urban and Suburban Habitats
Region
California, Florida, Northwest, Plains, Rocky Mountains, Southwest, Texas
Behavior
Direct Flight
Population
7.400.000
Range & Identification
Migration & Range Maps
Migrates in small flocks. Fall migration begins early, with many birds leaving northern breeding areas by the end of July.
Description
7-8 1/2" (18-22 cm). Male resembles male Baltimore Oriole but has orange face, more white in wing, different tail pattern. Female usually not as orange as female Baltimore, with grayer back, whiter belly, darker eyeline, but some not safely identified.
Size
About the size of a Robin, About the size of a Sparrow
Color
Black, Brown, Orange, White
Wing Shape
Rounded
Tail Shape
Rounded, Square-tipped
Songs and Calls
Clear and flute-like whistled single or double notes in short, distinct phrases with much individual variation. Also a rapid chatter.
Call Pattern
Falling
Call Type
Chatter, Chirp/Chip, Whistle
Habitat
Open woods, riverside groves. Breeds in deciduous trees in fairly open habitats, such as forest edge, isolated groves and streamside woods, especially in cottonwood trees. Readily adapts to some suburban neighborhoods if enough trees are present. Winters mostly in the tropics around forest edge and semi-open country.
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Behavior
Eggs
4-5, sometimes 3-7. Bluish white to pale gray, with brown and black markings concentrated at larger end. Incubation is by female, about 11 days.
Young
Both parents feed the nestlings. Young leave nest about 14 days after hatching.
Feeding Behavior
Forages by searching for insects among foliage of trees and shrubs, rarely on the ground. Sometimes flies out to catch insects in midair. Visits flowers for nectar, and will come to sugar-water feeders; also attracted to pieces of fruit put out at feeders.
Diet
Insects, berries, nectar. In summer feeds mostly on insects, especially caterpillars; also eats beetles, grasshoppers, crickets, wasps, bugs, and others, plus spiders. Eats many berries and wild fruits, sometimes cultivated fruit. Feeds on nectar and will take sugar-water.
Nesting
Male sings to defend nesting territory. In courtship, male faces female and stretches upright, with tail spread and wings quivering and partly open. Nest site is in tall deciduous tree, suspended from the tips of slender drooping branches, usually 10-25' above the ground, can be up to 50' high. Nest (built by female, sometimes with help from male) is a hanging pouch, with its rim firmly attached to a branch; tends to be wider and deeper than the nest of Baltimore Oriole. Nest is tightly woven of plant fibers, strips of bark, vine tendrils, grass, yarn, and string, lined with fine grass, plant down, hair.
Climate Vulnerability
Conservation Status
Still widespread and common, with only slight declines noted in recent decades.
Climate Threats Facing the Bullock's Oriole
Choose a temperature scenario below to see which threats will affect this species as warming increases. The same climate change-driven threats that put birds at risk will affect other wildlife and people, too.