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A black crown stripe runs over the top of the head, with chestnut patches on either side. 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.
For example, the white-faced whistling ducks with more black coloration are commonly found in western Africa where rainfall supersedes the dry season. The back and wings are dark brown to black, and the underparts are black with a fine white barring on the flanks. The neck is chestnut. Males and females have similar plumage.
These ducks come in a variety of colors and include chocolate, silver, and a snowy white. But don't let these adorable ducks fool you; even though they look primed for snuggling, these birds ...
[6] [7] The most noticeable feature on adult birds, is the dark body contrasting with a whitish head and neck. Males have mostly dull yellowish bill, blackish mottling on the head and upper neck, white lesser median coverts and inner edges of tertials and bluish-grey secondaries. In flight, white wing-coverts contrast with the rest of the wings.
Averaging 35.5 cm (14.0 in) and 370 g (13 oz), it rivals the green-winged teal as the smallest American duck. The bufflehead has a wingspan of 21.6 in (55 cm). [7] Adult males are striking black and white, with iridescent green and purple heads and a large white patch behind the eye.
The bird is predominantly black, with large white patches on the wing; the back feathers being iridescent and glossy in males, while the females are more drab. Although the Muscovy duck is a tropical bird, it adapts well to cooler climates, thriving in weather as cold as −12 °C (10 °F) and able to survive even colder conditions.
Pink-eared duck: Malacorhynchus membranaceus (Latham, 1801) 62 Salvadori's teal: Salvadorina waigiuensis Rothschild & Hartert, EJO, 1894: 63 Muscovy duck: Cairina moschata (Linnaeus, 1758) 64 White-winged duck: Asarcornis scutulata (Müller, S, 1842) 65 Hartlaub's duck: Pteronetta hartlaubii (Cassin, 1860) 66 Wood duck: Aix sponsa (Linnaeus ...
For instance, if someone is constantly exposed to black flies, for instance, they might experience headaches, fever, swollen lymph nodes and other symptoms of so-called "black fly fever," Frye says.