Search results
Results from the WOW.Com Content Network
Position of the uropygial gland, indicated on a budgerigar Uropygial gland of a blue jay. The uropygial gland, informally known as the preen gland or the oil gland, is a bilobed sebaceous gland possessed by the majority of birds used to distribute the gland's oil through the plumage by means of preening.
When preening, a bird (such as this red lory) draws individual feathers through its beak, realigning and re-interlocking the barbules.. Preening is a maintenance behaviour found in birds that involves the use of the beak to position feathers, interlock feather barbules that have become separated, clean plumage, and keep ectoparasites in check.
Anseriformes is an order of birds also known as waterfowl that comprises about 180 living species of birds in three families: Anhimidae (three species of screamers), Anseranatidae (the magpie goose), and Anatidae, the largest family, which includes over 170 species of waterfowl, among them the ducks, geese, and swans. Most modern species in the ...
Waterfowl production areas (WPAs) are a small component of the National Wildlife Refuge System. There are over 2 million acres (8,100 km 2) of this prime duck-producing land, mostly prairie potholes in the Dakotas, Minnesota, and Montana. The U.S. Fish and Wildlife Service owns, leases, or holds easements on the lands. [1]
While shortcomings certainly occur in Livezey's analysis, [citation needed] mtDNA is an unreliable source for phylogenetic information in many waterfowl (especially dabbling ducks) due to their ability to produce fertile hybrids, [2] in rare cases possibly even beyond the level of genus (see for example the "Barbary duck").
Preening, personal grooming of a bird's feathers especially by using its beak; Preen gland, also called the uropygial gland, an oil gland found in many bird species; Preen oil, an oil made by the uropygial gland found in many bird species
See entry for preening. gular region The posterior part of the underside of a bird's head, described as "a continuation of the chin to an imaginary line drawn between the angles of the jaw". [8] See also: gular skin. gular skin Also defined, gular sac / throat sac; gular pouch; gular flutter. Describes the gular region when it is featherless.
By 2007, $827 million had been spent in Canada to purchase and enhance waterfowl habitats encompassing 4.4 million acres (18,000 km²). [5] In total, joint ventures have invested $4.5 billion to protect 15.7 million acres (64,000 km²) of such habitats. [2] The plan coordinates activities with other organizations, such as Ducks Unlimited.