It was mid May and calving time in the Bison herds of Yellowstone and Teddy Roosevelt…And as the father of a 4-year-old and 5-year-old, I can really see the similarities in these wild babies and my kids…TONS of energy, lots of playing, stick close to mommy, and darn cute!
HISTORY OF BISON IN THEODORE ROOSEVELT NATIONAL PARK
[from the official park website: “In 1956, 29 bison were brought from Fort Niobrara National Wildlife Refuge in Nebraska and released in the South Unit of Theodore Roosevelt National Park. Here they roamed freely on 46,000 acres of park land and by 1962 the herd had increased to 145 animals. That year, 10 bulls and 10 cows were relocated to the 24,000-acre North Unit.”
“Though both units of the park can easily carry larger numbers of bison, park managers have currently set herd size at approximately 200 to 400 animals for the South Unit and 100 to 300 for the North Unit to maintain healthy range conditions.”
Two adolescent bulls go head to head in a play battle.
[From park website: “Cow groups usually consist of 20-60 animals composed of cows, bulls under 3 years, and a few old bulls. The herd is led by an older cow. As they graze, the group will travel 10-15 miles each day moving at a speed of 5-6 miles per hour. Most bulls live alone or in bachelor groups of up to 20 animals. Bulls tend to become more solitary with age.”
[From park website: “Cows usually conceive for the first time as three-year olds. Though calves can be born at any time of the year, the calving season usually begins in April after a 9 month gestation period. Calves are orange-red in color and are up and moving within 3 hours of birth. They stay very close to their mother for the first few weeks. Cows are very protective of their young. Eventually, calves venture further away from their mothers, playing with other youngsters in nursery groups, while always under the watchful eyes of other cows within the herd. After 3 months, the orange-red baby coloration starts to change to dark brown and the hump and horns begin to form. Calves remain with their mothers for about a year, or until another calf is born.”
LEARN MORE ABOUT BISON AT THEODORE ROOSEVELT NATIONAL PARK’S WEBSITE HERE