* Bison: Wyoming is home to the largest population of bison in the United States. These massive animals can weigh up to 2,000 pounds and stand 6 feet tall at the shoulder. Bison are grazers and prefer to live in open grasslands.
* Elk: Elk are another common sight in Wyoming. These large deer can weigh up to 700 pounds and stand 5 feet tall at the shoulder. Elk are browsers and prefer to live in forests and meadows.
* Mule deer: Mule deer are smaller than elk and white-tailed deer. They weigh up to 300 pounds and stand 3 feet tall at the shoulder. Mule deer are browsers and prefer to live in sagebrush flats and juniper woodlands.
* White-tailed deer: White-tailed deer are the most common deer in Wyoming. They weigh up to 200 pounds and stand 3 feet tall at the shoulder. White-tailed deer are browsers and prefer to live in forests and thickets.
* Pronghorn antelope: Pronghorn antelope are the fastest land animals in North America. They can reach speeds of up to 60 miles per hour. Pronghorn antelope are grazers and prefer to live in open grasslands.
* Bighorn sheep: Bighorn sheep are large, majestic animals that live in the mountains of Wyoming. They weigh up to 300 pounds and stand 3 feet tall at the shoulder. Bighorn sheep are browsers and prefer to live on steep, rocky slopes.
* Mountain goats: Mountain goats are another type of hoofed animal that lives in the mountains of Wyoming. They weigh up to 200 pounds and stand 3 feet tall at the shoulder. Mountain goats are browsers and prefer to live on high, rocky cliffs.
Birds
* Bald eagles: Bald eagles are majestic birds of prey that live in Wyoming. They have a wingspan of up to 7 feet and can weigh up to 14 pounds. Bald eagles are carnivores and eat fish, rabbits, and other small animals.
* Golden eagles: Golden eagles are another type of bird of prey that lives in Wyoming. They have a wingspan of up to 6 feet and can weigh up to 12 pounds. Golden eagles are carnivores and eat rabbits, rodents, and other small animals.
* Sandhill cranes: Sandhill cranes are large, migratory birds that live in Wyoming. They have a wingspan of up to 6 feet and can weigh up to 20 pounds. Sandhill cranes are omnivores and eat plants, seeds, and insects.
* Whooping cranes: Whooping cranes are endangered birds that live in Wyoming. They have a wingspan of up to 7 feet and can weigh up to 20 pounds. Whooping cranes are carnivores and eat fish, frogs, and other small animals.
* Yellowstone cutthroat trout: Yellowstone cutthroat trout are a native species of trout that live in Wyoming. They are found in cold, clear streams and rivers. Yellowstone cutthroat trout are carnivores and eat insects, small fish, and other aquatic animals.
* Brown trout: Brown trout are a non-native species of trout that live in Wyoming. They were introduced in the 1800s and have since become one of the most popular sport fish in the state. Brown trout are carnivores and eat insects, small fish, and other aquatic animals.
Reptiles
* Bull snakes: Bull snakes are the largest snakes in Wyoming. They can grow up to 8 feet long and weigh up to 15 pounds. Bull snakes are non-venomous and are not considered dangerous to humans.
* Rattlesnakes: Rattlesnakes are the only venomous snakes in Wyoming. There are two species of rattlesnakes in Wyoming: the prairie rattlesnake and the western rattlesnake. Prairie rattlesnakes are found in the eastern part of the state, while western rattlesnakes are found in the western part of the state. Rattlesnakes are not typically aggressive, but they will strike if they feel threatened.
* Garter snakes: Garter snakes are small, harmless snakes that are found throughout Wyoming. They typically grow to be 2-3 feet long. Garter snakes are non-venomous and are not considered dangerous to humans.
* Sagebrush lizards: Sagebrush lizards are small, brown lizards that are found in sagebrush flats throughout Wyoming. They typically grow to be 4-6 inches long. Sagebrush lizards are not poisonous and are not considered dangerous to humans.
* Collared lizards: Collared lizards are larger, gray lizards that are found in rocky areas throughout Wyoming. They typically grow to be 8-10 inches long. Collared lizards are not poisonous and are not considered dangerous to humans.
Amphibians
* Tiger salamanders: Tiger salamanders are large, black-and-yellow salamanders that are found in wet areas throughout Wyoming. They typically grow to be 6-8 inches long. Tiger salamanders are not poisonous and are not considered dangerous to humans.
* Spotted salamanders: Spotted salamanders are small, black-and-yellow salamanders that are found in wet areas throughout Wyoming. They typically grow to be 3-4 inches long. Spotted salamanders are not poisonous and are not considered dangerous to humans.
* Wood frogs: Wood frogs are small, brown frogs that are found in wet areas throughout Wyoming. They typically grow to be 2-3 inches long. Wood frogs are not poisonous and are not considered dangerous to humans.