Brown bears (Ursus arctos) are among the largest living carnivores on the planet. Within the species there is considerable variation between individuals, which has led to the formation of two different subspecies — Kodiak bears (Ursus arctos middendorff) and grizzlies (Ursus arctos horribilis). Grizzly bears are the more common of the subspecies and are sometimes listed interchangeably with brown bears.
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All grizzly bears are brown bears, but not all brown bears are grizzly bears. The bears you are watching on the cams are brown bears. Grizzly bears and brown bears are the same species (Ursus arctos), but grizzly bears are currently considered to be a separate subspecies (U. a. horribilis). Due to a few morphological differences, Kodiak bears are also considered to be a distinct subspecies of brown bear (U. a. middendorfii), but are very similar to Katmai’s brown bears in diet and habits.