Common Goldeneye vs Goosander

In short

The Common Goldeneye and Goosander (Common Merganser) are both diving ducks but differ significantly in structure and plumage. The most reliable field mark is the bill: the Common Goldeneye has a short, triangular bill, while the Goosander has a long, narrow, serrated bill. These differences are visible even at a distance.

Identification tips

1. Bill shape: Look for the short, triangular bill of the Common Goldeneye versus the long, narrow, serrated bill of the Goosander. 2. Head shape and color: The Common Goldeneye has a rounded head with a white spot near the bill in males, while the Goosander has a more elongated head. 3. Size and posture: Note the larger size and more elongated posture of the Goosander. 4. Habitat preference: Consider the body of water; Goosanders prefer larger lakes and rivers.

Size

The Goosander is larger and more elongated than the Common Goldeneye, with a more streamlined body and longer neck.

Plumage

Common Goldeneye males have a distinctive white spot near the bill and a more compact, rounded head. Females are brown-headed with a gray body. Goosander males have a white body with a dark green head, while females have a gray body with a reddish-brown head and a clear demarcation between head and neck.

Behaviour

Both species are diving ducks, but Goosanders often form larger flocks and are more likely to be seen on larger bodies of water.

Habitat

Common Goldeneyes prefer smaller lakes and rivers, often near wooded areas, while Goosanders are found on larger lakes and rivers and are more widespread in winter.

Voice

Vocalizations are not a primary distinguishing feature in the field. Both species are relatively quiet, but the Common Goldeneye's wing whistling sound in flight is notable.