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The greater scaup (Aythya marila), just scaup in Europe or, colloquially, "bluebill" in North America, [3] is a mid-sized diving duck, larger than the closely related lesser scaup and tufted duck. It spends the summer months breeding in Iceland , east across Scandinavia , northern Russia and Siberia , Alaska , and northern Canada .
The heads are strongly coloured in the males, orange-red in some species, and black with a green to purple sheen (structural colour) in good light; the sheen colour varies with both species and angle of light incidence – in for example greater scaup, the head has a green sheen in direct light, but a purple sheen when backlit. In females, the ...
During nesting season, the female lays a clutch of 7–12 eggs with each of them measuring 4.9–6 cm (1.9–2.4 in) in length and 3.4–4.4 cm (1.3–1.7 in) in width. Incubation lasts for 24–27 days and the nestlings leave after around 1–2 days. A gadwall can only raise one brood a season [2]
Scaup is the common name for three species of diving duck: Greater scaup, or just "scaup", Aythya marila; Lesser scaup, Aythya affinis;
When male turkeys inseminated female chickens, no hybrids resulted; however, the unfertilised chicken eggs began to divide. According to Olsen, [20] turkey-chicken crosses produced all males. A supposed turkey × pheasant hybrid was reported by Edwards in 1761. [22] A hybrid between a turkey and Ocellated turkey was reported in 1956. [23]
The adult female (hen) also has a black bill, a light brown head and neck, grading into a darker brown chest and foreback. The sides, flanks, and back are grayish brown. The bill is blackish and the legs and feet are bluish-gray. Its sloping profile distinguishes it from other ducks. [8]
Berberine, a plant compound traditionally used in herbal medicine, is today commonly stocked on the shelves of health food stores and pharmacies as a supplement.. Berberine supplements gained ...
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.