IUCN Conservation Status: Least Concern
Christopher L. Wood
Two scaup species live in North America: the Greater Scaup prefers salt water and is found in America and Eurasia, while the Lesser Scaup prefers freshwater and is found only in North America. The Lesser Scaup is one of the most abundant and widespread of the diving ducks in North America
Simple Steps for Identifying Confusing Brown Ducks—Females and Otherwise, All About Birds blog, November 21, 2014.
What to Watch For: Duck Courtship [video], All About Birds blog, January 20, 2015.