Studies conducted in the last 20 years suggest that the bison population at Yellowstone National Park includes two separate ...

Hormones are running high in Yellowstone National Park as bison enter their mating season, known as the rut. Males are particularly prone to aggression as they compete for dominance, so it's more ...

The original adult bison mate and have calves, those calves grow into adults who have calves, and so on. This generates much faster growth than, say, adding a constant number of individuals to the ...

(Remarkably, the upended bison managed to stay on its feet.) Yellowstone used the footage in August 2020 to caution tourists about the rut, or mating season, which typically lasts from late July ...

Bison breed in August and September, during which dominant males maintain a small “harem “of females for mating. A female's gestation period lasts 285 to 300 days, after which she gives birth to one ...