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This is a large duck, and the male's long central tail feathers give rise to the species' English and scientific names. Both sexes have blue-grey bills and grey legs and feet. The drake is more striking, having a thin white stripe running from the back of its chocolate-coloured head down its neck to its mostly white undercarriage.
The male also holds the tail erect during courtship displays. The feet are quite powerful, which aids in swimming and diving. The duck sits low in the water in comparison to other ducks. [2] During breeding season, apart from the aforementioned bright-blue bill, the male's head and neck are glossy black, and the back and wings are a rich chestnut.
Call Blue-winged teal drake in flight at Sacramento National Wildlife Refuge. The blue-winged teal is 40 cm (16 in) long, with a wingspan of 58 cm (23 in), and a weight of 370 g (13 oz). [9] The adult male has a greyish blue head with a white facial crescent, a light brown body with a white patch near the rear and a black tail.
The most common display in this species is the combination of female inciting and male turning the back of the head. [8] Female blue-billed teal incites males by doing lateral movements silently or nearly silently, and males usually respond by swimming ahead and turning the back of the head. [ 8 ]
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The ruddy duck is a small, compact duck with a stout, scoop-shaped bill, and a long, stiff tail which it holds cocked upward. It has a slightly peaked head and a fairly short, thick neck. The male ruddy duck has a blackish cap that contrasts with its bright white cheeks. In summer, it has a rich chestnut body with a bright blue bill.
The adult male has a blue-black head and neck, with a black rump and tail; the back and flank are lightly flecked with a pale yellow colour. The wings of males have contrasting white upper-coverts and black remiges, metallic green speculum feathers, and rusty brown tertials feathers. The male also has a dark grey flecked with pale-yellow breast ...
A black-bordered white collar separates the head from the breast. The body is largely a lighter slate blue with chestnut sides. A black-bordered white bar divides the breast vertically from the sides. The tail is black, long and pointed. The speculum is metallic blue. The inner secondary feathers are white and form white markings over the back ...