Mule deer which are native to Western North America are so named because of their ears, which resemble, yes you guessed it, a mule.
And that would be where the similarity ends, particularly when agility comes into play. They can "prong" right up there with the Pronghorn, covering great distances with their bouncing.
These photos were taken over the course of a couple of days & show a more relaxed mule deer doe & this year's offspring.
But you just have to love those big ears! :)