More Info: The plains bison is one of two subspecies found in North America, the other being the wood bison which tends to be smaller. The American bison can be found in the United States, Canada and Mexico, mostly in conservation areas, preserves or farms. The American bison is the largest mammal in North America. It grows to between 2.1 meters to 3.5 long from head to rump, and weigh 422 to 998 kilograms. Despite their massive size, bison are quick on their feet and capable of reaching speeds of up to 65kph.
Bison are known for roaming great distances and generally eat on the move. Buffalo are herbivores, which means they only eat vegetation. Typically, grass and herbs are on the menu, but they will also eat leaves and twigs. The cows and adult males tend to live in small separate herds and come together to form much larger herds in the summer mating season.
Grasslands National Park protects one of the nation's few remaining areas of undisturbed dry mixed-grass/short grass prairie grassland. Bison were introduced to Grasslands National Park in 2005, having been absent for over 120 years. The park also provides critical habitat for endangered species such as sage grouse, black-tailed prairie dogs, burrowing owls and the tiny swift fox.