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A photo of a Tricolored Blackbird (Agelaius tricolor), male
Tricolored Blackbird, Male

Tricolored Blackbird

Agelaius tricolor

The Tricolored Blackbird, Agelaius tricolor, is a striking passerine bird of the Icteridae family. It is characterized by the male's distinctive white stripes beneath their red shoulder patches, or "epaulets," which are particularly visible during flight or display. This species is not to be confused with the Old World common blackbird, a member of the thrush family.

Identification Tips

When observing the Tricolored Blackbird, look for the male's unique combination of colors: a glossy black body, a bright red shoulder patch, and a white line below the patch. The females are more subdued in coloration, with brownish tones and a less conspicuous shoulder patch.

Habitat

Historically, the Tricolored Blackbird was found in the marshes of California, nesting in wetland cattails and bulrushes. However, due to habitat loss, they have adapted to use both native and non-native vegetation, as well as agricultural fields for breeding and foraging.

Distribution

The range of the Tricolored Blackbird is limited to the Pacific coast of North America, from Northern California to upper Baja California in Mexico. They migrate south to Mexico during colder seasons and return to northern California when it warms.

Behaviour

This highly social and gregarious bird forms the largest colonies of any North American landbird, with a single breeding colony often consisting of tens of thousands of birds. They have adapted to significant environmental changes, including the use of agricultural fields for nesting.

Song & Calls

The Tricolored Blackbird's call is slightly more nasal than that of the Red-winged Blackbird, with a nasal "kip" and a sharp "check." The male's song is a garbled "on-ke-kaaangh."

Breeding

Breeding in large colonies, the Tricolored Blackbird has shown a remarkable ability to adapt to changing landscapes for nesting. They have shifted from primarily using freshwater marshes to incorporating non-native vegetation and agricultural fields as breeding grounds.

Similar Species

The Tricolored Blackbird can be confused with the Red-winged Blackbird, but the former can be distinguished by the white stripe below the red shoulder patch in males.

Conservation Status

The Tricolored Blackbird is currently listed as Endangered by the IUCN. Conservation efforts have been implemented to protect and enhance their habitat, with some success in stabilizing and increasing certain populations. However, the species remains vulnerable due to habitat loss and disturbances during the breeding season.

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