If the “mule deer vs. whitetail deer” game were about who would win in a fight, muleys might take the prize. Mule deer will get a little bigger than whitetails, especially leading up to the rut. Mule ...

Mule Deer vs Whitetail: Tails. The tails of mule deer, left, and whitetails, right, are totally different, making it easy to differentiate the species from behind. John Hafner Photography.

Whitetail deer, for example, consume small twigs and leaves, while reindeer have been known to eat bird eggs and even fish when necessary. Reindeer vs. Whitetail Deer: Antlers.