The blue crane. Usher. circa 2007.
... Cranes have come to play a unique role as ambassadors for peace, helping peoples from different countries to recognize the common ground that unites them. Principles and methods developed through the study and conservation of cranes have contributed to the foundation of broader national, international, and regional programs for the conservation of biological diversity and the implementation of the idea of sustainable land use. Meine, Curt D. and George W. Archibald (Eds). 1996. The cranes: Status survey and conservation action plan. IUCN, Gland, Switzerland, and Cambridge, U.K. 294pp. Northern Prairie Wildlife Research Center Online. http://www.npwrc.usgs.gov /resource/birds/cranes/index.htm (Version 02MAR98).