polar bear mother and two cubs Debra Garside

Take Our Quick Wildlife Quiz

Answer these seven questions for World Wildlife Day to see what you know about wildlife.

How big are polar bears when they are born?

The size of a newborn giant panda
The size of an adult house mouse
The size of an adult guinea pig
The size of an adult cat

Polar bears are the largest bears in the world and the Arctic's top predator. At birth, they are the size of an adult guinea pig. When fully grown, males usually measure about eight to nine feet nose to tail, and females are about six to seven feet long. And their feet are each the size of a dinner plate—about a foot wide!

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Shutterstock/Lukas Kovarik/WWF

True or false? Sloths are excellent swimmers.


Sloths are famous for moving slowly in the tree canopy. It surprises many to learn that sloths are strong swimmers. They will sometimes drop down from their treetop perches into water and use their lengthy arms to propel through the water.

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jaguar standing Richard Barrett/WWF-UK

How fast can a jaguar run?

20 miles per hour
35 miles per hour
50 miles per hour
65 miles per hour

Known more for its jump, the jaguar can reach speeds of up to 50 miles per hour for a short distance. These cats—the largest in the Americas—are also strong swimmers and climbers.

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narwhals at the surface of the water Paul Nicklen/National Geographic Creative/WWF-Canada

How many nerve endings are in a narwhal's tusk?

Around 100,000
Up to 10 million
Nearly 100 million
More than 250 million

Often dubbed the unicorns of the sea, narwhals are strange and beautiful Arctic creatures with long spiraled tusks protruding from their heads. The narwhal tusk is actually an enlarged tooth with sensory capability and up to 10 million nerve endings inside. Some narwhals have one or two tusks, while others have none. Tusks can grow as long at 10 feet.

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several tigers together Andy Wilcock/Shutterstock

What is a group of tigers called?

A streak
A troop
A parliament
A pride

Tigers are mostly solitary, but when they come together the group is called a streak—or an ambush! Individual tigers have a large territory whose size is determined mostly by the availability of prey. These cats rely primarily on sight and sound rather than smell for hunting.

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elephant standing in tall grass Christy Williams/WWF

True or false? There are elephants on the Southeast Asian island of Borneo.


The island of Borneo is the world's third largest island and home to some of the world's most biologically diverse rain forests—and Bornean elephants, found only in the northeastern part of the island. Bornean elephants, also knows as pygmy elephants, are distinctly smaller than their mainland cousins. They have long tails that sometimes touch the ground, relatively large ears, and straighter tusks. There may be fewer than 1,500 Bornean elephants left.

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many monarch butterflies in flight Court Whelan/Natural Habitat Adventures

How many generations of monarch butterflies does it take to make the southbound annual migration of 2,800 miles or more to Mexico?


A single generation performs the incredible feat of migrating from Southeast Canada and the Northeast United States to central Mexico to hibernate during the winter. At the beginning of spring, the same generation starts the return migration all the way to Texas, where they lay their eggs. The next three to five generations will continue to fly North to complete their journey.

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Debra Garside

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