The secret lives of grizzlies Additional Information

Recommended Web sites:

Learn about the WSU Bear Center at (Washington State University).

For more information about Lynne Nelson and her grizzly research, including pictures and videos, visit (Washington State University).

To learn more about grizzly bears and efforts to protect them, see (U.S. Fish and Wildlife Service).

Find out more about hibernation and the animals that do it at

Sohn, Emily. 2007. The rise of Yellowstone. Science News for Kids (Nov. 14). Available at

______. 2007. Polar bears in trouble. Science News for Kids (July 25). Available at

______. 2003. Watching for wildfires in Yellowstone. Science News for Kids (Sept. 24). Available at

Books recommended by SearchIt!Science:

[book] Searching for Grizzlies— Ron Hirschi

Published by Boyds Mills Press, 2005.

Come along on a journey to majestic Yellowstone National Park in search of grizzly bears. Filled with beautiful photographs, this book also includes travel-journal notes paired with a clear, informative text about grizzly bears. Discover how the grizzlies live in each season, what they eat, and how they differ from black bears. Learn about the grizzlies’ behavior, senses, behavior, and life cycle—while enjoying the narrative of an exciting wildlife-watching trip.

[book] Animals That Hibernate— Phyllis J. Perry

Published by Franklin Watts/Scholastic, 2001.

When winter comes, many animals dig in deep to sleep through the cold months. Learn the difference between the “deep sleepers” like the woodchuck and the “light sleepers” like bears. Some cold-blooded animals also hibernate. Even small creatures like snails and slugs must find safe, cozy places when the weather turns cold. They hide under logs or stones. They go into burrows, caves, or dens, under dirt, or even into mud. Scientists have a lot to learn about hibernation. Will it ever be possible for humans to hibernate? Includes a glossary, resource lists, and an index.

[book] Grizzly Bears— Gail Gibbons

Published by Holiday House, 2003.

In the past, grizzly bears lived throughout most of North America, but because the settlers killed many of them, they can now be found in only a small region of the United States. Learn about the habitat and habits of the grizzly in this introductory-level book, which pairs illustrations and diagrams with simple text to show grizzly bear characteristics and behavior. The book explains hibernation, reveals the life of grizzly cubs, and emphasizes the need to conserve and protect the bears. It ends with a page of grizzly facts.

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Power Words

heart The organ that pumps blood through the body. The hearts of humans and other mammals are made of muscle and have four main parts or chambers.

hibernation An inactive state resembling deep sleep in which certain animals living in cold climates pass the winter. In hibernation, the body temperature is lowered and breathing and heart rates slow down. Hibernation protects the animal from cold and reduces the need for food during the season when food is scarce.

mercury A chemical element that is a silvery-white metal and is a liquid at room temperature. Mercury is poisonous and is used to make pesticides. Until recently, mercury was also used as the fluid in thermometers.

Copyright © 2002, 2003 Houghton-Mifflin Company. All rights reserved. Used with permission.

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