Whooping crane restoration
Olsen, Glenn H. Patuxent Wildlife Research Center, United States Geological Survey, Laurel, Maryland.
- Whooping crane protection
- Captive breeding and reintroduction efforts
- Additional Readings
Whooping cranes (Grus americana) [Figs. 1 and 2] are the rarest, most endangered cranes in the world. They numbered only 22 birds in 1937, and their breeding grounds were not discovered until 1954. The status of the whooping crane population was instrumental in the enactment of the Endangered Species Act of 1973 in the United States. From these low numbers in the 1930s and 1940s, conservation and captive breeding efforts have increased their numbers to more than 550 whooping cranes today. Half of these whooping cranes are in the historic wild flock that migrates between the Texas Gulf Coast (in the United States) and northern Alberta (in Canada).
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Its dedicated editorial team is led by Sagan Award winner John Rennie. Contributors include more than 9000 highly qualified scientists and 42 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 17,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information