Harlequin Duck

The harlequin duck (Histrionicus histrionicus) is a small, strikingly patterned sea duck that migrates to mountain streams to breed. In Banff National Park, they are found in fast-flowing rivers like the Bow River and Pipestone River.

Identification

Males have a dramatic slate-blue body with white, black, and chestnut markings. Females are a more subtle brown with white patches near the eyes and ears. Harlequin ducks are smaller than mallards and are known for their ability to dive and swim in turbulent white water.

Habitat and Behavior

They spend their winters on rocky ocean coasts and move inland in spring to nest along clear, cold, fast-moving mountain streams. They feed on aquatic insects and larvae found on the bottom of the stream. They are highly sensitive to human disturbance and water quality.

Viewing

Look for harlequin ducks on the Bow River near the Village or along the Pipestone River in May and June. They are often seen standing on rocks in the middle of the current. Please observe from a distance to avoid stressing breeding pairs.