lesser scaup diet

Nesting. Only traces of fish were detected in scaup in winter 2016–2017, but fish comprised 18% of birds' overall diet in winter 2017–2018. The lesser scaup (Aythya affinis) is a small North American diving duck that migrates south as far as Central America in winter. Lesser scaup at Lake Ontario, Lake Erie, and Lake St. Clair, respectively, consumed more zebra mussels, nonmollusk animal matter (crustaceans and insects), and plant matter than did conspecifics at the … Lesser scaup generally ate more zebra mussels during spring and more gastropods and plants during autumn. Diet varies with season and habitat, but animal matter may predominate, especially mollusks such as clams and snails, also aquatic insects, crustaceans. Birds on the Great Lakes may feed heavily on the introduced zebra mussel. The nests are usually located on dry land close to water, in areas with dense cover, especially bulrush. Most Lesser Scaups probably breed at the age of two, nesting in late May through June.

It is colloquially known as the little bluebill or broadbill because of its distinctive blue bill. Dietary intake of lesser scaup differed between seasons and among stopover sites. Aquatic invertebrates such as insect larvae, crustaceans, and mollusks make up the majority of the Lesser Scaup's diet.

Also eats plant material such as stems and leaves of sea lettuce, pondweeds, wild celery, plus seeds of pondweeds, sedges, grasses, and others. Nesting.

Lesser scaup diets differed between winters, and between Low and both Medium and High temperature categories.

Our previous research indicated that forage quality in diets of Lesser Scaup (hereafter scaup) at two sites in Northwestern Minnesota was lower in springs 2000-2001 than that reported for springs 1986-1988, consistent with the SCH. Lesser scaup diets differed between winters, and between Low and both Medium and High temperature categories. Seeds and other parts of plants are also eaten.

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