Bison

The day the bison herd swam across the river says it all.

About 80 of the legendary mammals, known for hardiness and stubbornness, decided to cross the half-mile wide Pend Oreille River in 1994—bulls, cows, and even calves—and all survived the crossing, recalls Ray Entz, natural resources director of the Kalispel Tribe of Indians in northeast Washington.

That same rugged strength of the wooly North American bovines—whether you call them bison or buffalo—helped the entire resilient species survive. Although bison are now the national mammal of the United States, they once balanced on the cliff of extinction … » More …