Recovery 'roadmap' would see large herds roaming free over thousands of hectares but hinges on an overhaul of government regulations and a rethink of public attitudes to the animal

This article is more than 10 years old

This article is more than 10 years old

Bison, the iconic animal of the American west, could once more roam wild across the great plains under a recovery roadmap prepared by international scientists.

A report by the International Union for the Conservation of Nature (IUCN) (pdf), prepared by dozens of scientists and bison experts from Mexico, America, and Canada, says there is a chance of a second recovery, nearly a century after the animals were rescued from the brink of extinction.

But success depends on allowing large herds to roam free over thousands or perhaps millions of hectares, an overhaul of government regulations, and a rethink of public attitudes to the animal.

Currently, there is only one population of plains bison, in Yellowstone national park.

"The next 10-20 years present opportunities for conserving American bison as a wild species and restoring it as an important ecological presence in many North American ecosystems," the study says. It says the animals are critical to the restoration of the prairie grasslands.

But Americans, especially ranchers in the west who view the animals as competition for grazing lands or a potential source of disease in their cattle, need to accept its presence on the plains.

"The greatest challenge is to overcome the common perception that the bison, which has had a profound influence on the human history of North America, socially, culturally and ecologically, no longer belongs on the landscape," the study says.

Tens of millions of bison once grazed the rolling hills and prairies of North America, from Alaska to northern Mexico. But by the beginning of the 20th century, the great herds had almost completely wiped out by hunters trying to satisfy the European fur trade.

Early efforts managed to save the bison from the brink of extinction, and about 31,000 now roam free. But conservationists say more needs to be done to protect the genetic diversity of such herds to assure their long-term survival.

Aside from harsh winters, bison in the wild face a range of diseases from anthrax to BSE, or mad cow disease.

The study says the new conservation strategy should aim to recreate the traditional range of the bison.

"While substantial progress in saving bison from extinction was made in the 20th century, much work remains to restore conservation herds throughout their vast geographical range," said Cormack Gates, a University of Calgary conservationist who co-edited the study.

Several states continue to view bison as livestock rather than wild animals and about 400,000 bison are being raised in commercial herds. Some 55,000 of those belong to Ted Turner, the media magnate and CNN founder, who has ranches in seven states.

"The key is recognition that the bison is a wildlife species and to be conserved as wildlife, it needs land and supportive government policies," Gates said.

But persuading the public the bison should be free and not food may not be easy. In 2002, Turner's ranches were so successful in raising bison that he opened up a chain of bison burger restaurants that now stretches from Montana to Florida.