1. A diving duck (Clangula hyemalis) of northern regions, the male of which has white and dark plumage and the female brownish plumage.
Usage: ornithology; Also called long-tailed duck; the term 'oldsquaw' is considered dated or potentially offensive by some modern ornithologists

Examples

• The oldsquaw is a hardy duck that winters in northern waters.
• Birdwatchers spotted a flock of oldsquaws diving for food near the ice floes.
• The male oldsquaw displays striking black and white plumage during breeding season.
• Oldsquaws are known for their loud, distinctive calls across frozen lakes.
• In recent years, ornithologists have increasingly adopted the name 'long-tailed duck' instead of oldsquaw.