thumb|Female Brewer's blackbird calls
Brewer's blackbird (Euphagus cyanocephalus) is a medium-sized New World blackbird. It is named after the ornithologist Thomas Mayo Brewer.
Description
Adult males have black plumage with an iridescent purple head and neck and glossy bluish-green highlights on the rest of the body. The feet and legs are black and the eye is bright yellow. The female is brownish-grey with slight hints of the male's iridescence. The female's eyes are dark brown, while the male's is bright yellow. Overall, they resemble the eastern member of the same genus, the rusty blackbird; Brewer's blackbird, however, has a shorter bill and the male's head is iridescent purple.
These birds are often permanent residents in the west. Other birds migrate to the Southeastern United States and Mexico in Spring. The range of this bird has been expanding east in the Great Lakes region. Eggs are usually a tan color with darker speckles throughout to allow for camouflage. The female bird primarily incubates for 12–14 days. Brewer's blackbird chicks do not immediately open their eyes upon hatching and do not hatch with feathers. for animals committing or about to commit depredations upon ornamental or shade trees, agricultural crops, livestock, or wildlife, or when concentrated in such numbers and manner that they are a health hazard or other nuisance. They are moderately threatened by climate change. However, this could change if temperatures continue to rise. If temperatures rise by 3 degrees celsius, they could lose 30% of their range. Heat and wildfires are particularly threatening. It is estimated that there are currently 23 million Brewer's blackbirds in the wild.
Gallery
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File:Brewer's Blackbird puffed up.JPG|E. cyanocephalus male
File:Brewer's Blackbird - female.jpg|E. cyanocephalus female
File:Euphagus cyanocephalus1.jpg|The iridescent purple head of the male is a distinguishing feature.
File:Brewer's blackbird.jpg|Male, Nevada, US
File:Brewer's Blackbird4 .or (5).jpg|Male, Oregon, US
File:Euphagus cyanocephalus-female calling.jpg|Female calling
File:Euphagus cyanocephalus - Brewer's Blackbird - XC104520.ogg|Brewer's blackbird calling
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