Mammals:
* Large Mammals:
* Gray Wolf: Reintroduced in the 1990s, they play a crucial role in the ecosystem.
* American Bison: Thousands roam the park, representing a significant part of its history.
* Elk: Large herds graze in the park, especially in the Lamar Valley.
* Moose: These majestic giants are more solitary and often found near water.
* Pronghorn Antelope: The fastest land mammal in North America, these animals are often spotted in the open plains.
* Black Bear: These omnivores are common throughout the park, especially in areas with berries and fish.
* Grizzly Bear: Larger than black bears, these powerful predators are found in the park's higher elevations.
* Smaller Mammals:
* Coyote: These adaptable canines are commonly seen throughout the park.
* Red Fox: These smaller foxes are also found in the park.
* Beaver: These industrious rodents build dams and lodges throughout the park's streams.
* Mountain Lion: These elusive predators are rarely seen, but their presence is felt.
* Bobcat: These smaller wild cats are often spotted in forested areas.
* Porcupine: These spiky mammals are found throughout the park, especially in forested areas.
Birds:
* Bald Eagle: These iconic birds of prey are often seen soaring overhead.
* Golden Eagle: Another majestic eagle, often seen hunting in the park's open areas.
* Peregrine Falcon: These fast and agile birds are often spotted soaring above cliffs.
* Osprey: These fish-eating birds are often found near lakes and rivers.
* Trumpeter Swan: These large, graceful birds are a common sight near water.
* Yellowstone Cutthroat Trout: These fish are native to the park and are popular among anglers.
Reptiles and Amphibians:
* Garter Snake: These common snakes are often seen near water.
* Western Painted Turtle: These turtles are found in the park's lakes and rivers.
* Great Basin Spadefoot Toad: These toads are often seen during the spring breeding season.
Other Wildlife:
* Yellowstone Cutthroat Trout: These fish are native to the park and are popular among anglers.
* Various Insects: From butterflies to dragonflies, Yellowstone's insect population is diverse and essential to the ecosystem.
* Bats: These nocturnal mammals play an important role in controlling insect populations.
This list only covers some of the more common animals in Yellowstone. The park is home to a vast array of wildlife, and exploring its diverse ecosystems is an adventure in itself.