Yosemite Warns Visitors That One of the Park's 'Most Dangerous Animals' Isn't One You'd Expect

When you think of Yosemite’s most dangerous wildlife, grizzlies or mountain lions might come to mind—but according to the National Park Service, it’s the humble-looking mule deer that tops the list for visitor injuries. According to Yosemite National Park, every year, mule deer cause more injuries in Yosemite National Park than any other animal.

In an Instagram post shared earlier this week, Yosemite National Park officials shared the fascinating warning. With their large, expressive eyes and iconic “mule-like” ears, these deer may look like harmless meadow grazers—but don’t let appearances fool you.

View this post on Instagram

A post shared by Yosemite National Park (@yosemitenps)

“Mule deer are skittish by nature and will use their hooves and antlers to defend themselves if startled,” the park service warned. Adding that bucks, in particular, become dangerously aggressive during the late fall rut, using their sharp antlers to battle other males for mating rights. Naturally, if a person gets too close during this time, they risk becoming collateral damage.

(Photo by Gary Coronado/Los Angeles Times via Getty Images)

Gary Coronado/Getty Images

A stark reminder of this danger came in November 2021, as reported by Fox26News, when a young girl was attacked after approaching a deer that had been fed by other visitors. The animal, startled and agitated, charged her with its antlers, causing deep arm wounds and lacerations to her chest.

Mule deer are commonly spotted along Yosemite’s trails, meadows, and even crossing roads—but the park officials made it clear: keep your distance. Feeding or approaching wild animals is illegal. “While they might appear friendly and adorable, mule deer are, at their core, wild animals that deserve their space,” officials emphasized via the instagram post. 

So if you’re headed to Yosemite this season, respect the wildlife and admire from afar. It’s the best way to stay safe—and keep your trip wild for the right reasons.