Animal Behavior: Bison are gregarious animals and are arranged in groups according to sex, age, season, and habitat. Cow groups are composed of females, males under three years of age, and a few older males. Males live either individually or in groups that may be as large as 30. When bison travel, they form a line. The traveling pattern is determined by the terrain and habitat condition. An adult cow supplies the leadership. 

Eating Habits: Bison are year-round grazers. They feed primarily on grasses, but when food is scarce, they will eat vegetation such as sagebrush. Bison require water every day as well.  

Range: Bison are now found on private and protected lands in areas of the western United States and Canada. The most prominent of those herds are those of Yellowstone National Park in Wyoming, and Wood Buffalo Park, Northwest Territory, Canada. 

Conservation Efforts: Bison are listed as endangered by the U.S. Endangered Species Act. The IUCN Red List has listed them as Near Threatened. 

Animal Facts: Typical lifespan status in the wild is 15 to 20 years, while Range lifespan status in captivity is 40 years. One calf is born per season, weighing from 15 to 25 kg. Bison are important members of functioning prairie ecosystems. They can carry and transmit diseases that also infect domestic cattle, such as Brucellosis.