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Why do bears have powerful front claws?
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bear
Grizzly bear in Jasper National Park, western Alberta, Canada.
Bears possess powerful front claws that are primarily adapted for digging. These nonretractile claws are typically better developed on the front feet than on the rear, allowing bears to efficiently excavate small rodents or access nutritious plant roots from the ground.1
While claws across various mammals can be adapted for scratching, clutching, or climbing, the specific shape and strength of a bear's claws are suited to its food-getting habits. These structures are hardened, keratinized modifications of the epidermis that provide the necessary leverage for the bear's foraging activities.21