Lincoln Park Zoo

Common name: Red-breasted merganser Latin Name: Mergus serrator Class: Birds Order:    Anseriformes Description The red-breasted merganser is a sexually dimorphic species, meaning males and females differ in appearance. During breeding season, the male has a bright green head, a brown and black speckled chest, a black back and a white band around the neck. The female has a brown head, a gray back and wings, and a white chest and belly. When breeding season is over, the male becomes less colorful, adopting plumage resembling the female, except with a darker back. Both genders have a long double crest of feathers extending from the back of the head.

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Range
The red-breasted merganser can be found in North America, Northern Africa, Europe and Asia.

Status
Common

Habitat
The species inhabits large lakes, rivers and oceans.

Niche
The red-breasted merganser dives underwater to catch its prey, feeding on fish, tadpoles, insects and crustaceans.

Life History
The female lays 7–12 eggs in a nest constructed in a scrape on the ground. The nest is often obscured by thick vegetation and located on an island to protect it from predators. The female lines the nest with grasses and feathers to cushion the eggs. Red-breasted merganser chicks leave the nest within a day or two after hatching, following their mother to the water to feed.

Special Adaptations

• Like all ducks, the red-breasted merganser’s feet are thin and flat, making it easier for them to paddle through the water.