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.