Lesser scaup

The lesser scaup is a small diving duck native to North America, readily identifiable by its distinctive blue bill. During the winter, it migrates south to Central America. This species is closely related to the greater scaup. The scientific name of the lesser scaup is derived from Ancient Greek and Latin, underscoring its similarity to its greater counterpart.

Adult lesser scaups measure approximately 38-48 cm in length and weigh between 454-1,089 grams, with males generally being slightly larger than females. Male lesser scaups possess black iridescent heads, while females are dark brown with a prominent white band at the base of their bill.

These ducks are not very vocal, but the hens have a distinctive call. Differentiating between lesser and greater scaups can be challenging, particularly for females and juveniles. Hybridization with other duck species can further complicate identification.

Lesser scaups primarily feed on mollusks, seeds, and aquatic plants. They prefer to nest near water in sheltered locations, with the females solely responsible for raising the young.

Unfortunately, the population of lesser scaups has been in decline since the mid-1980s, reaching a nadir in the early 21st century. Researchers are investigating potential causes, including declining breeding success, pollution, habitat destruction, and competition with other species. Despite this decline, the lesser scaup is still classified as a Species of Least Concern by the IUCN. However, ongoing conservation efforts are essential to monitor and protect these ducks for the future.