Are there mountain lions in Yellowstone?

The mountain lion, also called the cougar, is the largest member of the cat family living in Yellowstone. Mountain lions can weigh up to 200 pounds, although lions in Yellowstone are thought to range between 140 and 160 pounds for males and around 100 pounds for females.



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There are an estimated 34 to 42 mountain lions that reside year-round in Yellowstone. But for wildlife watchers in the park they remain a rare and special sight. The lions tend to move across rugged and difficult-to-access terrain, and are adept at hiding.

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Weighing as much as 700 pounds apiece, they had no serious rivals. Grizzly bears, Yellowstone's top predators, are capable of bringing down an adult elk, but they mainly prey on calves. Coyotes, though numerous, were much too small to attack elk.

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Wolves in Yellowstone sit at the core of a larger population connected throughout the Greater Yellowstone Ecosystem. In general, wolf numbers have fluctuated between 83 and 123 wolves since 2009.

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Approximately 150–200 with home ranges wholly or partially in the park. As of 2021, 1,063 estimated in greater Yellowstone.

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It's perfectly possible to spot a bear any time of day in the Park, especially in cooler weather, but mid-summer you are unlikely to see bears out in the heat of the day, when they tend to nap in the forest. You don't need to go hiking into the backcountry to see bears.

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Female Grizzly Bear in Yellowstone steal from humans, so you have to work a bit harder to find them, but once you do bears show much more natural behavior. They are active throughout Yellowstone in spring, summer and fall then hibernate all winter, emerging sometime in March or early April.

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For 27 years, Jackson Hole Grizzly 399 has been strolling into human, biological and conservation history in the Greater Yellowstone Ecosystem. Unbeknownst to her, she's become the most famous living wild bear on Earth.

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About 800 moose inhabit the southern part of Yellowstone, Grand Teton National Park and surrounding national forests. This largest member of the deer family loves cold weather and frequents marshy meadows and edges of lakes and streams.

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Yellowstone provides summer range for an estimated 10,000–20,000 elk (Cervus canadensis) from six to seven herds, most of which winter at lower elevations outside the park. These herds provide visitor enjoyment as well as revenue to local economies through hunting outside the park.

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Wolf: One of the most elusive Yellowstone animals and one of the most rewarding. Wolves can be seen hunting in packs in one of the valleys, or they can be a lucky sighting that lasts just a minute as they travel past the road, vanishing as quickly as they appeared.

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Is it safe to drive in Yellowstone at night? Yes, but take caution. Wildlife is active at night and it can be difficult to see animals on the road until it's too late.

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