Buffalo in Yellowstone National Park
Buffalo calf Yellowstone National Park © Shawn Coggins
American bison aka buffalo are the largest North American land animals.
Buffalo calving season is late April to early May.
YouTube animation of buffalo calf shown above.
Buffalo calf on the road . Wildlife on the roads in Yellowstone is a given.
Buffalo on the road in Yellowstone National Park © Shawn Coggins. Stopped cars in the middle of the road are also a given in Yellowstone.
"American bison migrate out of Yellowstone National Park during the winter and these movements are more frequent and involve greater numbers of animals during years of heavy snow when populations are high, generally over 3000 individuals (Chevelle et al. 1998). Recently, (1985-1986) harvest has resumed in response to Montana movements out of Yellowstone National Park. American bison at the National Bison Range are confined to the range and no migration is possible. This species previously made mass migrations across the prairie in spring and fall, with mountain populations moving to lower elevations in valleys.' from Montana Fish Wildlife and Parks ~ Montana Field Guide.
Young buffalo calf running at sundown in Yellowstone National Park © Shawn Coggins..
"Normally, ome calf is born mid-April to early June, with most births occurring in May. Cows usually give birth in isolation where vegetation provides cover. Isolation during birth is infrequent where cover is lacking (Meagher 1986). Brucellosis causes abortion and temporary sterility in cattle, but in Yellowstone [National Park] apparently does not effect pregnancy rates to any significant degree. Most calves are weaned by late fall or by the end of the first year and remain with their mother until spring or later if she does not conceive. The life span of an American bison is 18 to 22 years." from Montana Fish Wildlife and Parks ~ Montana Field Guide.
Fall in Yellowstone
Solitary Buffalos tend to stick the the same general area year after year in Yellowstone National Park © Shawn Coggins..
According to the Montana Field Guide published by Montana Fish, Wildlife and Parks 'American bison are grazers and feed on grasses, forbs, and sedges. The massive head is used to sweep snow away from forage. They possess a greater digestive capacity than cattle. In Yellowstone National Park, sedges are most important in all seasons, grasses second in importance. . . '
Technical reference Montana Field Guide.
Bison — Bos bison.