description Lesser Scaup Overview
The lesser scaup, Aythya affinis, is a North American diving duck that breeds in northern parts of the continent and migrates to the United States, Mexico, Central America, and the Caribbean. It gathers on lakes, reservoirs, wetlands, and estuaries, often in large flocks, and feeds by diving for aquatic invertebrates and plants. Breeding males are black and white, while females are brown, and the species is noted for its small peaked head.
help Lesser Scaup FAQ
Where does the lesser scaup migrate?
The lesser scaup, Aythya affinis, breeds in northern North America and migrates to the United States, Mexico, Central America, and the Caribbean. It uses lakes, reservoirs, wetlands, and estuaries during different parts of the year.
How can I tell a lesser scaup from a greater scaup?
Size and head shape are useful clues, but the two scaup can be difficult to separate in the field. Lesser scaup usually have a smaller profile and a more peaked head, while greater scaup often look larger and rounder-headed.
Why do lesser scaup gather in large flocks?
Large flocks provide many eyes for detecting predators and help birds exploit rich aquatic feeding areas. The species commonly gathers on open water, reservoirs, wetlands, and estuaries during migration and winter.
What does a lesser scaup eat while diving?
It feeds by diving for aquatic plants, seeds, mollusks, and other small invertebrates. The exact food mix depends on the wetland or coastal habitat available at the time.
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