How to Identify Bison in Michigan

American bison bulls weigh 900 to 2,000 pounds and stand 5.5 to 6 feet at the shoulder, making them distinctly larger and heavier than most cattle breeds. Female bison are smaller, typically 600 to 900 pounds. In Michigan, if you see large domestic cattle such as Highland or Galloway breeds, they usually weigh 1,000 to 1,800 pounds for bulls and are 4.5 to 5.5 feet tall at the shoulder. Both bison and these cattle breeds are massive compared to deer or moose, but wild bison are heavier per unit of height and have a more compact, muscular build.

Bison have a prominent shoulder hump, a heavily furred front quarter that makes their front half look much larger than their hindquarters, and a massive head with a pronounced forehead. Their horns are shorter and curve inward more sharply than cattle horns. Bison also have a thick beard or chin fringe and shaggy fur that covers their entire body. In contrast, domestic cattle have a level back, no shoulder hump, longer and more outward-curving horns, and smooth coats in most breeds. The Highland and Galloway breeds kept in Michigan or nearby may have thick coats and long horns, but they lack the hump and the heavy front-end build of bison.

No wild bison exist in Michigan to identify by color, but American bison are typically dark brown to black, with calves born in spring displaying lighter tan or rust coloration before darkening with age. The Great Plains bison and wood bison (a northern subspecies) both occur in dark brown or black. Domestic cattle breeds in Michigan vary widely from solid black to black and white, brown, tan, and red. If you spot an animal with bison coloring, examine the body shape and hump before concluding it is a bison, as many cattle breeds also display dark brown or black coats.

Bison hoofprints are roughly 3.5 to 4 inches wide, nearly circular, and deeply impressed when the animal is moving through soft soil or mud. Cattle hoofprints are typically 2.5 to 3.5 inches and more oval. Bison droppings are larger than cattle droppings, often 4 to 5 inches across and rounded, whereas cattle dung is typically flatter and more patty-like. Bison also create distinct wallows, circular or oval depressions in soil or dust where they roll to remove parasites and shed fur. Since no wild bison range in Michigan, any wallow or sign you find will have been made by domestic livestock.

Yes, bison ranged throughout the Great Lakes region, including Michigan, until the early 1800s. Paleoecological evidence and early European records document bison in the state, particularly in the grasslands and prairies of the Lower Peninsula. However, by the 1850s, overhunting had eliminated all wild bison from Michigan and the entire eastern United States. The last of Michigan's bison were killed by mid-century, and no restoration programs have reestablished wild bison populations in the state.

Hunting pressure from European settlers and Native Americans in the 1700s and 1800s drove bison to extinction east of the Mississippi River. Market hunters killed bison for hides and meat, and habitat loss to agriculture and settlement removed the open grasslands bison preferred. By 1850, only a few thousand bison remained in North America, all in the remote western plains and mountains. Michigan's forests and current land use do not provide the open grassland habitat bison need, and no reintroduction effort has been launched in the state.

Wild bison are now found primarily in the western United States, mainly in Montana, Wyoming, South Dakota, and other Great Plains and mountain states. Yellowstone National Park, the National Bison Range in Montana, and the American Prairie Reserve in Montana all support free-ranging bison herds. Canada's Wood Buffalo National Park in Alberta and Northwest Territories protects a distinct northern wood bison subspecies. These locations offer the best opportunity to see wild bison and observe their behavior, herd structure, and seasonal movements in natural habitats.

The American plains bison is the smaller subspecies, with adults weighing 800 to 2,000 pounds and inhabiting the Great Plains grasslands. The wood bison is the larger northern subspecies, weighing up to 2,300 pounds and found in boreal forests and subarctic regions of Canada. Wood bison have a larger hump, heavier forequarters, and thicker fur than plains bison. Both subspecies have the same shoulder hump, inward-curving horns, and heavy front-end build that distinguish them from domestic cattle. Neither subspecies has returned to Michigan.

Yes, you may see captive bison in Michigan zoos and wildlife parks such as the Detroit Zoo or Binder Park Zoo. These animals are pure American plains bison and display all the identification features of wild bison: the prominent shoulder hump, heavy forequarters, shorter inward-curving horns, and thick coat. Captive bison are valuable for education and conservation breeding but are not wild animals. If you want to see bison behaving naturally and roaming freely, visit a national park, national bison range, or wildlife refuge in the western United States.

Michigan's largest wild mammals are moose in the Upper Peninsula, which weigh 600 to 1,400 pounds and have a long face and large palmate antlers in bulls. White-tailed deer are common throughout the state but much smaller, weighing 100 to 300 pounds. Black bears weighing 200 to 400 pounds inhabit Michigan's forests. If you spot a massive shaggy animal with a shoulder hump, it is almost certainly a domestic cattle breed such as Highland or Galloway, not a wild bison. Report any unusual large animals to the Michigan Department of Natural Resources Wildlife Division.

Visit the National Bison Association website or wildlife guides specific to the Great Plains to study bison anatomy and behavior. The American Society of Mammalogists and state wildlife agencies publish field guides with bison identification, diet, and historical range maps. If you spot an animal in Michigan that you believe might be bison or an unusual domestic animal, photograph it from a safe distance and contact the Michigan Department of Natural Resources. For bison viewing trips, check the websites of Yellowstone National Park, the National Bison Range, and the American Prairie Reserve for visitor information and safety guidelines.