In flight, the wings are thin and the tail is relatively long and rounded. Small diving duck with thin serrated bill Females are brown with a puffy crest and partly yellow bill Mergansers are our only ducks that specialize in eating fish The hooded is the smallest of our three native merganser species, and often seems to be the least numerous, as it tends to live around swamps and wooded ponds where it may be overlooked. A diferencia de otros esmerejones que se alimentan casi exclusivamente de peces, el hooded merganser tiene una dieta más diversa, bucea y captura peces pequeños, insectos acuáticos y crustáceos, sobre todo cangrejos de río, con la ayuda de unos ojos bien adaptados a la visión subacuática.
It is the second smallest species of merganser, with only the smew of europe and asia being smaller, and it also is the only merganser whose native habitat is restricted to north america. Small, forested, freshwater wetlands with emergent vegetation are the preferred breeding habitat of the hooded merganser They have been known to breed in more open habitat when nest boxes are available They breed in the northern united states and southern canada, favoring areas with mature trees for nesting.
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