Our country’s treasured national parks are home to all kinds of wildlife—some more dangerous than others. A visit to Everglades National Park may result in a run-in with an alligator, while checking out Colorado’s Rocky Mountain National Park could include a mountain lion encounter. But according to Yosemite National Park’s recent public service announcement, it’s not bears that pose the biggest threat to their tourists. Credit: Deposit PhotosAlthough they don’t necessarily look too fierce, mule deer remain wild animals that are frequently skittish and easily spooked. Convicted violators can expect as much as a $300 fine, with or without mule deer injuries.