• A pair of whooping cranes in Indiana. (Photo: U.S. Fish and Wildlife Service Headquarters/Wikimedia Commons)

Sites owned by the United States military could one day be used as stopover sites for migrating wild whooping cranes making the almost 3,900 kilometre journey from Wood Buffalo National Park in Canada to Aransas National Wildlife Refuge in Texas.

"Stopover places are just as important as wintering and nesting areas because they can't fly in one trip," Chester McConnell, a wildlife biologist and co-founder of the Alabama-based Friends of the Wild Whoopers, told the Victoria Advocate in September.

The Advocate reported that McConnell and Felipe Chavez-Ramirez, science adviser for Friends of the Wild Whoopers, are assessing 45 sites that fall in or near the flock's migration corridor for possible stopover habitat.

McConnell told the Advocate that ideally the birds would have protected habitat about every 100 miles (160 kilometres) along their migration corridor, which passes through North Dakota, South Dakota, Nebraska, Kansas and Oklahoma.

A U.S. Geological Survey report published in September found that lands with some type of protection covered about 10 per cent of the migration corridor used by whooping cranes.

McConnell told the Advocate that acquiring land for habitat is expensive, but that partnerships between military installations and wildlife groups could cut down the cost.