The white-tailed deer's coat is a reddish-brown in the spring and summer and turns to a grey-brown throughout the fall and winter. The characteristic white underside to its tail, which it shows as a signal of alarm by raising the tail during escape, makes the deer easily recognizable.
Males re-grow their antlers every year. Antlers begin to grow in late spring, covered with a highly vascularised tissue known as velvet. Typical antlers are symmetrical and the points grow straight up off the main beam.
The white-tailed deer is a ruminant, that is, it has a four-chambered stomach. Each chamber has a different and specific function.