

Whooping Cranes (B877)
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Photo ID: B877
Keywords: Grus americana: Whooping crane: crane
The Whooping Crane (Grus americana), the tallest North American bird, is an endangered crane species named for its whooping sound and call. Along with the Sandhill Crane, it is one of only two crane species found in North America. The whooping crane's lifespan is estimated to be 22 to 24 years in the wild. The whooping cranes' breeding habitat is the muskeg of the taiga; the only known remaining nesting location is Whooping Crane Summer Range in Wood Buffalo National Park in Alberta, Canada and the surrounding area. With the recent Whooping Crane Eastern Partnership Reintroduction Project, whooping cranes nested naturally for the first time in 100 years in the Necedah National Wildlife Refuge in Central Wisconsin, USA. They nest on the ground, usually on a raised area in a marsh. The female lays 1 or 2 eggs, usually in late-April to mid-May. The blotchy, olive-colored eggs average 2½ inches in breadth and 4 inches in length (60 by 100 mm), and weigh about 6.7 oz (190 g). The incubation period is 29–35 days. Both parents brood the young, although the female is more likely to directly tend to the young. Usually no more than one young bird survives in a season. The parents often feed the young for 6–8 months after birth and the terminus of the offspring-parent relationship occurs after about 1 year.[citation needed] Breeding populations winter along the Gulf coast of Texas, USA near Corpus Christi on the Aransas National Wildlife Refuge, Matagorda Island, Isla San Jose, and portions of the Lamar Peninsula and Welder Point, which is on the east side of San Antonio Bay.[4] The Salt Plains National Wildlife Refuge in Oklahoma is a major migratory stopover for the crane population hosting over 75% of the species annually.[5][6] The whooping crane is endangered mainly as a result of habitat loss. At one time, the range for these birds extended throughout midwestern North America. In 1941, the wild population consisted of 21 birds. Since then, the population has increased somewhat, largely due to conservation efforts. As of April 2007 there were about 340 whooping cranes living in the wild, and another 145 living in captivity. The whooping crane is still one of the rarest birds in North America. The United States Fish and Wildlife Service confirmed that 266 whooping cranes made the migration to Aransas National Wildlife Refuge in 2007.[7]
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