Which of these most common types of deer has the longest lifespan?
Among the most common types of deer, the mule deer (Odocoileus hemionus) has been known to have one of the longest lifespans. In the wild, mule deer can live up to 10 years or more, while in captivity they can live up to 20 years or more. However, it's worth noting that the lifespan of any individual deer can be influenced by various factors such as habitat quality, predation, disease, and hunting pressure. Other common types of deer, such as white-tailed deer and red deer, typically have a lifespan of around 6-8 years in the wild.