Surf Scoter vs Black Scoter

In short

The Surf Scoter and Black Scoter are similar sea ducks, but the Surf Scoter male is easily identified by its distinctive white patches on the head and multicolored bill. Female and immature Surf Scoters have a paler face and a whitish nape patch, unlike the Black Scoter.

Identification tips

1. Male Surf Scoter: Look for white patches on the head and a multicolored bill. 2. Female Surf Scoter: Check for a whitish nape patch and paler face. 3. In flight: Surf Scoter wings are completely dark, while Black Scoter wings have a two-toned pattern. 4. Calls: Listen for the Black Scoter's distinctive whistling.

Size

Surf Scoter males are slightly larger and heavier than Black Scoter males, with Surf Scoter females also being larger than their Black Scoter counterparts.

Plumage

Male Surf Scoters are velvety black with white forehead and nape patches, while Black Scoter males are uniformly black. Female Surf Scoters have a dark brown plumage with a distinctive whitish nape patch, whereas Black Scoter females have a dark cap and light cheeks without the nape patch.

Habitat

Both species are found in coastal waters, but Black Scoters often form large, monospecific flocks during winter.

Voice

Black Scoter males are known for their constant mellow, plaintive whistling, which is a key auditory distinction.