King Eider vs Harlequin Duck

In short

The King Eider and Harlequin Duck can be distinguished by their plumage and behavior. The King Eider is larger and has a distinctive colorful head pattern in males, while the Harlequin Duck is smaller with a slate blue body and bold white, black, and chestnut markings. Both species have unique habitats and behaviors that aid in identification.

Identification tips

1. Size and Structure: King Eiders are larger with a more robust build. 2. Male Plumage: Look for the colorful head of the male King Eider versus the slate blue and patterned Harlequin Duck. 3. Habitat: Note the environment; King Eiders are more likely in open sea or icy waters, while Harlequin Ducks are near rocky shores or rivers. 4. Behavior: Observe feeding behavior; Harlequin Ducks are adept in turbulent water. 5. Vocalization: Listen for the distinctive squeaks of Harlequin Ducks.

Size

The King Eider is larger than the Harlequin Duck.

Plumage

Male King Eiders have a striking colorful head with a pale blue crown and a bright orange bill, while Harlequin Ducks have a slate blue body with bold white, black, and chestnut markings. Female King Eiders are more subdued in color, similar to female Harlequin Ducks, but the latter have more distinct white facial markings.

Behaviour

King Eiders are sea ducks that dive for marine invertebrates, while Harlequin Ducks are known for their ability to swim and feed among boulders in fast-flowing rivers and coastal surf.

Habitat

King Eiders are found in Arctic and sub-Arctic marine environments, often near sea ice, while Harlequin Ducks prefer rocky coastlines and fast-flowing streams.

Voice

Harlequin Ducks produce a squeaky, unducklike sound, often referred to as 'sea mice,' while King Eiders are generally quieter, with less distinctive vocalizations.