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A photo of a Baltimore Oriole (Icterus galbula), male
Baltimore Oriole, Male

Baltimore Oriole

Icterus galbula

The Baltimore oriole (Icterus galbula) is a small icterid blackbird, a migratory breeding bird common in eastern North America. The male's vibrant orange and black plumage is reminiscent of the coat-of-arms of the 17th-century Lord Baltimore, hence the name. This medium-sized passerine typically measures 17–22 cm in length with a wingspan of 23–32 cm. Adults are characterized by white bars on the wings, with males boasting a more pronounced orange hue on the underparts, shoulder patch, and rump, while females and juveniles display a more subdued yellow-brown and dull orange-yellow coloration.

Identification Tips

Males are distinguished by their black head and back with bright orange to yellow-orange underparts and a solid black tail. Females and juveniles are less boldly colored, with a mix of brown and orange hues. All adults have distinctive white wing bars, which are useful for identification from a distance or in flight.

Habitat

Baltimore orioles favor open woodland, forest edges, and partially wooded wetlands. They are also found in orchards, farmland, urban parks, and suburban areas with woodlots. During winter, they inhabit flowering canopy trees, often over shade coffee plantations.

Distribution

The Baltimore oriole breeds from the Canadian Prairies and eastern Montana eastward through southern Canada and the eastern United States, migrating to winter in Central America and northern South America. They are rare vagrants to Western Europe.

Behaviour

Outside of mating season, Baltimore orioles are solitary. They are monogamous, though extra-pair copulation is not uncommon. Males establish territories in the spring and perform various displays to attract females. After mating, the female weaves a remarkable hanging nest where she lays her eggs.

Song & Calls

The male's song is a series of sweet whistles, while calls include a nasal "veeer" and a low chatter. Females also sing, especially when defending their nests. Both sexes emit specific warning calls during confrontations.

Breeding

Baltimore orioles are generally monogamous and solitary outside the breeding season. The female constructs a hanging, pouch-like nest at the end of a branch, where she lays 3-7 eggs. Both parents feed the nestlings, which fledge after about two weeks.

Similar Species

The Baltimore oriole may be confused with the Bullock's oriole, but the latter has a more western distribution. Other similar species include the Scott's and Audubon's orioles, which differ in their coloration and range.

Diet and Feeding

Orioles primarily feed on insects, berries, and nectar. They are adept at foraging in trees and shrubs and are known to sip at hummingbird feeders. They play an important ecological role by consuming pests such as the forest tent caterpillar moth.

Conservation status

The Baltimore oriole is currently listed as Least Concern by the IUCN. However, its population has experienced a decline due to factors such as habitat loss and Dutch elm disease, which has reduced nesting sites.

Baltimore Oriole Sounds



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Baltimore Orioles on Birda

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Agelaioides badius
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