CLEVELAND — The Cleveland Metroparks Zoo's family continues to grow. This week, the zoo welcomed three new bison to its mix. 

The zoo said all three females came from the Minnesota Zoo. Their names are Blue, 6 years old; Grun, 2 years old; and Topaz, 5 months old.

Bison are the largest mammal in North America, according to the U.S. Department of the Interior. The average female bison weighs up to 1,000 pounds and can be up to 4 to 5 feet. Males can weigh up to 2,000 pounds and reach 6 feet tall.

While they can be big, they can also run pretty fast. On average, they can run up to 35 mph.  

Yellowstone National Park is the only area bison have roamed freely since prehistoric times, according to the U.S. Department of the Interior. They can live up to 20 years old.