Britannica AI Icon

lesser scaup

bird
Also known as: Aythya affinis, little bluebill

Quick Summary

The lesser scaup (Aythya affinis) is a common North American diving duck, also known as the little bluebill. It is similar to the greater scaup but is smaller, with males having heads glossed with purple, unlike the green gloss of the greater scaup. Females are brown with white patches around their blue bills.12

Lesser scaups are about 38–51 cm (15–20 inches) long. They are popular game birds and are often found in large flocks offshore during winter, where they dive for food, primarily clams. In flight, a distinguishing feature is that the white stripe on the rear of their wing extends only halfway to the wingtip, shorter than that of the greater scaup.234

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.