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Grizzly Bear

Part of Hall of North American Mammals.

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September Morning
, Yellowstone National Park, Wyoming

You’d be wise to avoid stumbling upon this scene in the wild. Grizzly bears are unpredictable and may become aggressive if interrupted while eating or tending cubs. This mother is doing both: she’s showing her six-month-olds how to tear open a rotted pine for ants and grubs to eat.

Grizzly bears are actually the same species as the brown bears behind you. Members of this species can grow to very different sizes depending on where they live. The nickname “grizzly” comes from the grizzled, or silver-tipped, hairs on their backs and shoulders.

Yellowstone Canyon and Lower Falls

Established in 1872, Yellowstone was the first national park in the United States. Grizzly bears survive largely in remote, protected regions like this.

Still, Yellowstone has not alw