Custer State Park in South Dakota sees first bison calf born on April 4.
Each year in Custer State Park, the state of South Dakota hosts one of the nations largest buffalo roundups. The park holds a herd of approximately 1,300 free range bison.
The roundup is followed by an auction during which the state sells off a portion of the herd in an effort to control the population. Earlier in April, park officials noticed the first bison calf of the year was born into the wild herd.
Calving for bison, like many other animals, takes place primarily in the Spring. Custer State Park officials typically see the bison calving season take place between late April and Early May.
Many bison calves will weigh as much as 50 pounds at birth.