Common Eider vs Common Scoter

In short

The Common Eider and Common Scoter are both sea ducks, but they can be distinguished by their size, plumage, and bill characteristics. The Common Eider is larger with a distinctive wedge-shaped bill, while the Common Scoter is smaller and has a more uniform dark plumage with a yellow patch on the male's bill.

Identification tips

1. Size and Shape: Look for the larger size and wedge-shaped bill of the Common Eider. 2. Plumage: Note the striking black and white of male Eiders versus the uniform sooty black of male Scoters. 3. Bill: The male Scoter's bill has a distinctive yellow patch. 4. Habitat: Eiders are more coastal, while Scoters prefer open sea. 5. Vocalization: Listen for the piping whistles of the male Scoter.

Size

The Common Eider is larger, with a more robust build compared to the smaller and more streamlined Common Scoter.

Plumage

Male Common Eiders have a striking black and white plumage, while females are mottled brown. Common Scoter males are sooty black with a yellow patch on the bill, and females are dark brown without the contrasting patterns seen in Eiders.

Behaviour

Both species are diving ducks, but Common Eiders often form crèches, which is less common in Scoters. Eiders may also be seen in larger, more social groups.

Habitat

Common Eiders are typically found in coastal marine environments, often near rocky shores, while Common Scoters are more often seen in open sea and less frequently near the coast.

Voice

Common Eiders are generally quieter, whereas male Common Scoters produce thin, piping whistles that can be heard over distances in calm weather.