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How are deer hooves adapted for walking and running?

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male white-tailed deer — deer Male white-tailed deer (*Odocoileus virginianus*).

Deer are unguligrade mammals, meaning they walk and run on the tips of their digits, which are protected by hard, flexible coverings called hooves. This specialized foot posture is a key adaptation for speed and endurance, allowing deer to efficiently bear their body weight on an insensitive, durable surface while moving across various terrains.12

As artiodactyls, or even-toed ungulates, deer possess hooves that are cloven, meaning each toe is covered by a separate hoof. This structure consists of two primary components:
* Unguis: A hard, broad upper portion that surrounds the end of the toe and forms a protective rim.1
* Subunguis: A softer plate covering the bottom of the toe that forms a tough pad, providing cushioning and support.1

By walking on the tips of their toes, deer minimize the surface area in contact with the ground and reduce the weight at the end of their legs. This anatomical arrangement functions similarly to a pendulum, which increases the speed of leg oscillation and enhances the animal's ability to run quickly.13