White-Tailed Deer Have you ever wanted to be able to swim 13 mph like the White-Tailed Deer? The white-tailed deer is the state animal of Pennsylvania. The white-tailed deer is the most common deer. White-Tailed Deer have good eyesight and hearing. The maximum age for a white-tailed deer is 20 years old, but most deers live from 2-3 years and only few make it past 10. White-Tailed Deer flash their white tails to tell other deer that there is a predator around.