Search results
Results From The WOW.Com Content Network
The Black Duck Joint Venture is a conservation partnership established in 1989 to stabilize and restore the population of the American black duck (Anas rubripes). [ 1 ] [ 2 ] It consists of government and non-governmental agencies and organizations in Canada and the United States. [ 3 ]
The American black duck (Anas rubripes) is a large dabbling duck in the family Anatidae.It was described by William Brewster in 1902. It is the heaviest species in the genus Anas, weighing 720–1,640 g (1.59–3.62 lb) on average and measuring 54–59 cm (21–23 in) in length with an 88–95 cm (35–37 in) wingspan.
According to the International Union for Conservation of Nature (IUCN), 77 bird species in the United States are threatened with extinction. [1] The IUCN has classified each of these species into one of three conservation statuses: vulnerable VU, endangered EN, and critically endangered CR (v. 2013.2, the data is current as of March 5, 2014 [1]).
In 2007 the final Comprehensive Conservation Plan was signed, adding the eleventh division, York River Division. When land acquisitions are complete, the refuge will be about 14,600 acres (59 km 2) in size. In 1984, a National Estuarine Research Reserve was established in Wells, Maine. The reserve land is made up of portions of the Upper and ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
The Stewart B. McKinney National Wildlife Refuge is a 950-acre (384.5 ha) National Wildlife Refuge in ten units across the U.S. state of Connecticut.Located in the Atlantic Flyway, the refuge spans 70 miles (110 km) of Connecticut coastline and provides important resting, feeding, and nesting habitat for many species of wading birds, shorebirds, songbirds and terns, including the endangered ...
The retention of ancestral genetic variation can be caused by incomplete lineage sorting (ILS) and introgression after secondary contact. These two factors can cause genetic variation to be shared between closely related species which is possibly why an American black duck or a Mottled duck (Anas fulvigula) may have notable white on its speculum or a Mexican duck may have flecks of green.
The most critical threat facing threatened birds is the destruction and fragmentation of habitat. [6] The loss of forests, plains and other natural systems into agriculture, mines, and urban developments, the draining of swamps and other wetlands, and logging reduce potential habitat for many species.