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 ...

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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 ...