The Harlequin Duck is a small duck of fast streams and rivers in the summer, and pounding coastal waters in the winter. Studies on the species have shown that many adult birds have suffered broken bones in their past, obviously due to their preferred habitats. They are generally only short distance migrants from the summer breeding locations, and thus are only very rare visitors to the deep interior of the continent. The Birds of South Dakota (SDOU, 2001) lists only a single documented case of the species in South Dakota. One was also seen below Oahe Dam near Pierre in the winter of 2003.
Habitat
In summer, they are found along fast moving streams and rivers, often in forested lands of Canada, Alaska, and the extreme U.S. Northwest. During migration and winter, they are mostly found on the ocean, often in extremely rough coastal waters.
Diet
Primarily mollusks, crustaceans, and insects. Will also feed on marine worms, small fish, and a small amount of plant material.
Behavior
Uses a variety of techniques to forage for food, including diving and swimming underwater and dabbling on the water's surface. Strongly associated with water, they usually tightly follow the course of a river in flight, rather than fly overland.
Breeding
Non-breeder in South Dakota.
Song
Usually silent, but both sexes have low croaks, and the male has quite squeaks during courtship.
Migration
Summers in Alaska, western Canada, and locally in the Northwest U.S., as well as locally in eastern Canada. Winters along the Pacific and Atlantic coastlines, generally from the northern U.S. and along Canada and Alaska.
Interactive eBird Map
Click here to access an interactive eBird map of Harlequin Duck sightings
Similar Species
The male is generally unmistakable, but the female is somewhat similar to a female Bufflehead.
Status
Populations in the western part of North America are generally stable, but eastern populations have declined substantially since 1900.
Further Information
- eBird - Harlequin Duck
- Audubon Field Guide - Harlequin Duck
- Cornell Lab of Ornithology - All About Birds: Harlequin Duck
Photo Information
June 22nd, 2006 - Kenai Peninsula in Alaska, near Soldatna - Terry Sohl
