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Lesser scaup become sexually mature in their first or second summer. The oldest known individual reached an age of over 18 years. [3] [19] Before the start of the population decline (see below), about 57% of the lesser scaup nests failed each breeding season because the female was killed or the eggs were eaten or destroyed. The average brood ...
The family Anatidae includes the ducks and most duck-like waterfowl, such as geese and swans. These birds are adapted to an aquatic existence with webbed feet, bills which are flattened to a greater or lesser extent, and feathers that are excellent at shedding water due to special oils. Forty-seven species have been recorded in Maine.
Scaup is the common name for three species of diving duck: Greater scaup, or just "scaup", Aythya marila; Lesser scaup, Aythya affinis; New Zealand scaup, ...
Lesser scaup, Aythya affinis (A) Hooded merganser, ... The males have black and dark-brown plumage, an erectile crest on the nape, and a larger bill than the female ...
Lesser scaup, Aythya affinis (A) Masked duck, ... The males have black and dark-brown plumage, an erectile crest on the nape, and a larger bill than the female. The ...
These are gregarious ducks, mainly found on fresh water or on estuaries, though the greater scaup becomes marine during the northern winter. They are strong fliers; their broad, blunt-tipped wings require faster wing-beats than those of many ducks and they take off with some difficulty.
Lesser scaup, Aythya affinis (A) Steller's eider, ... The female is the brighter of the sexes and initiates courtship. The male incubates the eggs and tends the young.
Lesser scaup, Aythya affinis (A) Lesser white-fronted goose, Anser erythropus; ... The female is the brighter of the sexes and initiates courtship. The male incubates ...