Bryan McAllister’s personal reference notebook
July 30, 2026Short & citedBlog
Civic Viewpoint.
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Field Notes • Mammals

American black bear

The American black bear (*Ursus americanus*) is a bear species native to North America and the most widely distributed bear on the continent.

Updated July 30, 20261 min readCited sources

The American black bear is the most widely distributed bear species in North America, found from Canada to Mexico. Despite its name, its fur can be black, brown, cinnamon, blue-grey, or rarely white.

What it is

The American black bear (*Ursus americanus*) is a medium-to-large omnivorous bear native to North America. It has a straight facial profile, rounded ears, non-retractable claws, and a flat back without the prominent shoulder hump seen in brown bears. Coat colour varies widely, making it an unreliable identifier.

Key details

Adults typically measure 1.5–1.8 m in length and weigh 90–272 kg, though size varies by sex, age, and season. They live 15–25 years in the wild and are listed as least concern. Their diet is mostly plant-based—grasses, berries, nuts—but includes insects, carrion, and small mammals.

Why it matters

Black bears are common in Canadian forests and near rural communities, making them a familiar wild mammal. While usually shy, they can become dangerous when attracted to human food or garbage. Understanding their behaviour helps reduce conflicts and supports coexistence.

In short

  • Most common bear species in North America, ranging from Canada to Mexico.
  • Omnivorous diet dominated by plant matter like berries and nuts.
  • Fur colour varies widely; not a reliable way to identify species.
  • Generally avoid humans but can be risky when food-conditioned.
Canadian angle

American black bears are widespread in Canada and are one of the most familiar large wild mammals for Canadian readers, especially in forested regions and near rural communities.

Quick questions

What do black bears eat?
They are omnivores, eating mostly vegetation such as grasses, berries, fruits, nuts, and roots, plus insects, carrion, fish, and small mammals.
How big are black bears?
Adults are about 1.5–1.8 m long and weigh 90–272 kg, with variation by sex, age, and season.
Are black bears dangerous?
They are usually not aggressive but can injure humans when provoked or habituated to human food. Avoid feeding them and secure garbage to prevent conflicts.

Sources

  1. U.S. National Park Servicehttps://www.nps.gov/articles/000/american-black-bear.htm
    Supports: Size range, colour variation, physical traits, and comparison with grizzly bears.
  2. U.S. National Park Servicehttps://www.nps.gov/subjects/bears/black-bears.htm
    Supports: Habitat, range, diet, lifespan, and general behaviour.
  3. Animal Diversity Webhttps://animaldiversity.org/accounts/Ursus_americanus/
    Supports: Seasonal diet composition and omnivorous feeding habits.
  4. National Wildlife Federationhttps://www.nwf.org/Educational-Resources/Wildlife-Guide/Mammals/Black-Bear
    Supports: Diet, habitat, and comparison with grizzly bears.
  5. NC State Extensionhttps://content.ces.ncsu.edu/black-bear
    Supports: Diet, habitat flexibility, size variation, and human food use.
  6. International Fund for Animal Welfarehttps://www.ifaw.org/animals/black-bears
    Supports: Range, habitat, size, diet, and lifespan.
  7. Connecticut Department of Energy and Environmental Protectionhttps://portal.ct.gov/-/media/deep/wildlife/pdf_files/outreach/bearwise-meet-the-american-black-bear.pdf
    Supports: Diet composition and opportunistic feeding.