Spectacled Eider vs Harlequin Duck

In short

The Spectacled Eider and Harlequin Duck are both striking sea ducks, but they can be distinguished by their distinct plumage patterns and habitats. The Spectacled Eider is known for its unique 'spectacles' around the eyes, while the Harlequin Duck has a more complex pattern of slate blue, white, black, and chestnut. Their behaviors and preferred environments also differ significantly.

Identification tips

• Look for the white spectacles on the Spectacled Eider's face, especially in males.
• Note the intricate slate blue and chestnut pattern of the Harlequin Duck.
• Consider the habitat: Spectacled Eiders are more likely in open sea environments, while Harlequin Ducks are often found in turbulent rivers or rocky shores.
• Listen for the Harlequin Duck's squeaking calls.

Size

Both species are medium-sized sea ducks, but the Spectacled Eider is generally bulkier than the more streamlined Harlequin Duck.

Plumage

The Spectacled Eider features distinctive white 'spectacles' around the eyes on a mostly green head in males, with a black body. In contrast, the Harlequin Duck has a slate blue body with bold white, black, and chestnut markings, giving it a more colorful and intricate appearance.

Behaviour

Spectacled Eiders are more likely to be seen in large flocks at sea, while Harlequin Ducks are known for their unique ability to navigate and feed in fast-flowing rivers and rocky coastal areas. Harlequin Ducks are also relatively tame and can be approached closely.

Habitat

Spectacled Eiders are typically found in Arctic coastal waters, often in large flocks. Harlequin Ducks, however, prefer turbulent rivers and rocky coastlines, especially during winter.

Voice

Harlequin Ducks produce a distinctive squeaking sound, earning them the nickname 'sea mice,' whereas the vocalizations of Spectacled Eiders are less well-documented and not a primary identification feature.