Bears are carnivoran mammals of the family Ursidae.They are classified as caniforms, or doglike carnivorans.
The claws on the front feet are larger than those on the back and may be a hindrance when climbing trees;
Bears' non-retractable claws are used for digging, climbing, tearing, and catching prey.
They are capable of bursts of speed but soon tire, and as a result mostly rely on ambush rather than the chase.
They distribute their weight toward the hind feet, which makes them look lumbering when they walk.
The strong forelimbs are used to catch prey, excavate dens, dig out burrowing animals, turn over rocks and logs to locate prey, and club large creatures.
The limbs are much straighter than those of the big cats as there is no need for them to flex in the same way due to the differences in their gait.