Yellowstone National Park is home to the largest population of grizzly bears in the lower 48 states, with an estimated 600-1,000 bears.

The African elephant is the largest land mammal in Africa, with males weighing up to 13,000 pounds and females weighing up to 8,000 pounds.

The greater sage-grouse is known for its elaborate courtship dance, during which the male inflates its throat sac and makes a booming sound.

The emperor penguin is the largest species of penguin, with males reaching a height of 4 feet and weighing up to 90 pounds.

Cobras are known for their long, slender necks and ability to spit venom. They are found in Africa, Asia, and Australia.

The moose is the largest species of deer in North America, with males weighing up to 1,800 pounds and females weighing up to 1,000 pounds.

Orcas, also known as killer whales, are known for their distinctive black and white markings and their ability to swim long distances. They are found in all oceans.

The polar bear is the largest species of bear in the world, with males weighing up to 1,700 pounds and females weighing up to 1,000 pounds.

Jaguars are known for their long, sharp claws and their ability to climb trees. They are found in Central and South America.

The tiger is the largest species of cat in the world, with males weighing up to 660 pounds and females weighing up to 370 pounds.

Macaws are known for their long, colorful feathers and their ability to fly long distances. They are found in Central and South America.

The ostrich is the largest species of bird in the world, with males reaching a height of 9 feet and weighing up to 320 pounds.

Monkeys are known for their long, prehensile tails and their ability to swing through trees. They are found in Africa, Asia, and South America.

The saltwater crocodile is the largest species of reptile in the world, with males reaching a length of 23 feet and weighing up to 2,300 pounds.

Herons are known for their long, sharp beaks and their ability to eat fish. They are found in all parts of the world.