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Whooping Crane

Latin name: Grus americana
Taxonomic group: Birds
Risk category: Endangered 
Range: NT
Year of designation: 1978

Whooping Crane PhotoWhooping Crane Photo

Description:
Whooping Cranes are large white birds with a long neck, black wing tips, long black legs, and a red crown. Their large wings span about 2 m, and the bird stands more than 1.5 m tall. 
Biology:
The breeding age of Whooping Cranes is not known, but it has been estimated that they begin breeding at 4 or 5 years of age. The nest is usually a flat-topped mound of vegetation in shallow water. A female usually lays two eggs per year, but she generally raises only one young. Whooping Cranes eat crustaceans, fish, small mammals, insects, roots, berries and grain.

Whooping Cranes belong to the group of waterfowl and wading birds that learns to migrate from parent birds, travelling by day and apparently memorizing the landscape and picking up other clues. The family group typically remains together over the winter and flies back north in the spring. This poses problems for the captive breeding program, since cranes reared in captivity will have to be taught where to migrate to before they can be released, and then may not be able to survive the winter. 


Whooping Crane Range Map Population and Distribution:
In the nineteenth century, the Whooping Crane's breeding range extended from the Northwest Territories to central Iowa and Illinois. It wintered from Louisiana to northern Mexico. It is believed that the population of Whooping Cranes never exceeded 1500 birds; approximately 90% of this population disappeared between 1870 and 1900, and, by 1912, there were only 80 to 100 whooping cranes left. The population of whooping cranes increased from 49 birds in 1974 to 70 in 1977, due to conservation efforts. The slow increase in the population is partly due to the loss of birds which occurs during migration. The Canadian flock, which breeds on a 25 km by 25 km area in the Northwest Territories, winters in Texas, on the shore of the Gulf of Mexico. During migration, Whooping Cranes are found in northeastern and north-central Alberta, and in southwestern Manitoba, but they are most often seen in central and southeastern Saskatchewan. 
 


Habitat:
During the breeding season, Whooping Cranes inhabit marshy or swampy areas on the prairies and in aspen parkland. During migration, they are found in grainfields near sloughs or ponds. 
Threats:
Human activities, such as hunting and development, threaten this species. The migration corridor is undergoing continuous industrial development, and Whooping Cranes collide with power lines and microwave towers. Oil and chemical pollution in the Gulf of Mexico could destroy wintering habitat. Weather conditions are also very important. During the breeding season, a drought or bad storm could destroy eggs and new-born chicks. The entire wintering flock could be wiped out by a hurricane. 
Protection:
The Whooping Crane is protected in Canada under the federal Migratory Birds Convention Act of 1917, under Saskatchewan's Wildlife Act of 1997, and under Manitoba's Endangered Species Act of 1994. It appears on Alberta's provincial red list. In the United States, Whooping Cranes are protected under the Endangered Species Act of 1973. The wintering and breeding grounds of the species are in protected areas.

The United States and Canada have set up several programs to protect this species. During migration, Whooping Cranes can often be found with Sandhill Cranes, which are a species that is legally hunted. In several states where there are hunting zones for Sandhill Cranes, the hunting season can be closed if Whooping Cranes are spotted. The Saskatchewan Museum of Natural History, the Saskatchewan Wildlife Federation, the Whooping Crane Conservation Association, the National Audubon Society and other conservation groups have generated a great deal of publicity about this bird in order to heighten public awareness of the plight of this species. 

Recovery efforts:
A recovery plan for the Whooping Crane was approved in 1987 and then in 1993 by RENEW (the Committee on the REcovery of Nationally Endangered Wildlife). The goal of the plan is to increase populations of the Whooping Crane to the point where the status classification of the species can be improved. A 1995 memorandum of understanding with the United States indicated that a population of 1000 individuals is the desired goal.

The objectives of the recovery plan for 1998/1999 are: 
1) to study in greater depth the foraging ecology of the crane; 
2) to continue studying the use of the ultralight aircraft to teach captive-reared Whooping Cranes to migrate, as has been tested on Sandhill Cranes; and
3) revision of the recovery plan by a joint Canada/United States recovery team. 

The long-term objecitves are: 
1) to establish 40 breeding pairs in Wood Buffalo National Park by the year 2000 and for 10
years; and
2) to establish two other wild populations, each with a minimum of 25 breeding pairs, by the year 2020 (one a nonmigratory flock in Florida, the other a migratory flock nesting in Manitoba's Interlake Marsh area. This latter population will need to be taught a new migratory route, from Canada to the Gulf Coast).

Summary of research and monitoring activities: 
- 1986 to 1997: researchers conducted breeding ground surveys to monitor nesting effort in Wood Buffalo National Park.
- 1988 to present: the use of staging areas in Saskatchewan by Whooping Cranes was monitored.
- 1993 to 1994: the team tracked Sandhill Crane migration routes in order to identify their wintering areas, to determine whether Sandhill Cranes could be used as guide-birds for Whooping Cranes.
- 1996: crane breeding habitat was described, including the types of marsh habitat cranes use in Wood Buffalo National Park. 
- 1996 to 1998: a study was undertaken of Manitoba's Interlake Marsh area; this Manitoba
site is the preferred introduction site as it provides the best degree of isolation for a new flock from the existing Wood Buffalo National Park flock.
- 1996 to present: biologists are investigating the species' food sources on their breeding grounds, predominantly small fish, insects, small mammals and seeds and berries. 

Summary of recovery actions from 1988 to 1998: 
- Ongoing: an active public awareness program in Saskatchewan.
- 1993 to present: development of a Canadian captive breeding facility (currently containing 20 Whooping Cranes) at the Calgary Zoo.
- 1997 to present: Canadian and U.S. breeding centres are sending young for release in Florida; the Florida population consisted of 62 cranes in 1997.
- 1993 to 1998: release techniques for a migratory reintroduction are being developed in Canada and the U.S. Ultralight aircraft are being used to teach a specific migration route to surrogate Sandhill Cranes, and training flights with Whooping Cranes are also underway. 
- 1993 to 1994: a comparative study of three potential captive-release sites along the Saskatchewan/Manitoba border was conducted. Results indicate that all sites have suitable habitat, but that the most southerly site (Yorkton) would be the most cost efficient. 
- 1997: egg collection was discontinued after 30 years, during which 232 eggs were collected in Wood Buffalo National Park to establish and maintain captive rearing centres in the U.S. (228 eggs) and Canada (4 eggs).
- 1997 to present: Canadian and U.S. breeding centres are sending young for release in Florida. The Florida population consists of 62 cranes (1997). 

Summary of progress to date: 
Habitat protection on the nesting and wintering grounds over the last 75 years provided conditions for the recovery of this species. Captive breeding facilities in Canada and the U.S. are providing the stock for reintroduction and creation of a new migratory flock. There were good habitat conditions on the breeding grounds in 1997 and a record of 49 nesting pairs. Sixteen of these pairs hatched two young each (twins) and two pairs successfully raised both young. 1997 was the first in 34 years that "twins" arrived on the wintering grounds. To downlist the species to "threatened" requires a minimum of 40 breeding pairs in the Wood Buffalo National Park population for at least 10 years (a stable population). The population has had three consecutive years of more than 40 pairs breeding. 

 


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