The range is a complex of contiguous water bodies, primarily lakes and various wetlands, such as marshes and bogs, but also includes streams and ponds. In addition to the whooping crane nesting area, the range includes two sites classified during the International Biological Program.2
Because the area developed through wildfires, "no natural forest fires in the area are extinguished unless they threaten structural facilities or...leave the boundaries of Wood Buffalo National Park".2
A whooping crane census in 1941 counted only 15 migratory birds. There are currently 178 migratory birds which winter and breed in coastal Texas, primarily in the Aransas National Wildlife Refuge.4 Annual population surveys are conducted by the Canadian Wildlife Service. A few breeding pairs of the nationally endangered Peregrine Falcon also nest in the range. Due to the significant threat of extinction of whooping cranes, access to nesting sites is strictly controlled, limited only to researchers and park staff, and low-flying aircraft is prohibited in the area.4