Hooded Merganser illustration
Birdsong field guide

Hooded Merganser

Lophodytes cucullatus

The Hooded Merganser is a small, ornate diving duck characterized by its fan-like crest and specialized 'sawbill' for hunting aquatic prey.

What it sounds like

A low, mechanical, frog-like 'crrr-crrr-crrr' or a gravelly croak during courtship.

Reference call, compare with what you heard
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Rec. Jonathon Jongsma · United StatesCC BY-SAXeno-canto

Field notes

  • Males feature an inflatable, white-and-black crest used for elaborate courtship displays.
  • They are secondary cavity nesters, often occupying abandoned woodpecker holes or nest boxes.
  • Equipped with a specialized third eyelid called a nictitating membrane that acts like underwater goggles.
  • As 'sawbills,' they possess serrated mandibles specifically evolved to grip slippery fish and crustaceans.
  • Females frequently engage in brood parasitism, laying eggs in the nests of other Hooded Mergansers or Wood Ducks.
Habitat
Forested wetlands, quiet ponds, and swamps; brackish estuaries and tidal creeks during winter.
Range
Endemic to North America; breeds in southern Canada and the northern/eastern US, wintering along the coasts.
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