Goosander vs Red-breasted Merganser

In short

The Goosander (Mergus merganser) and Red-breasted Merganser (Mergus serrator) are both large, fish-eating ducks with slender, serrated bills. The Goosander is typically found on freshwater bodies, while the Red-breasted Merganser is more coastal. Key differences include the male Goosander's white body and dark green head, compared to the male Red-breasted Merganser's gray body and shaggy crest.

Identification tips

1. Male Plumage: Look for the Goosander's white body and dark green head versus the Red-breasted Merganser's gray body and shaggy crest. 2. Habitat: Note the habitat; Goosanders are more likely on freshwater, while Red-breasted Mergansers are coastal. 3. Female Crest: The Red-breasted Merganser female has a more pronounced crest. 4. Bill Shape: Both have serrated bills, but the Goosander's is slightly thicker.

Size

Both species are similar in size, but the Goosander is slightly larger and bulkier.

Plumage

Male Goosanders have a striking white body with a dark green head, while male Red-breasted Mergansers have a gray body, white neck ring, and a shaggy, reddish-brown crest. Females of both species have gray bodies and reddish-brown heads, but the Red-breasted Merganser's crest is more pronounced.

Behaviour

Both species dive for fish, but the Goosander is more often found in freshwater, whereas the Red-breasted Merganser is frequently seen in coastal areas.

Habitat

Goosanders prefer freshwater lakes and rivers, especially in forested areas. Red-breasted Mergansers are more coastal, often found in bays and estuaries.

Voice

Vocalizations are not a primary distinguishing feature in the field, as both species are generally quiet.