Optional page title

Optional page description text area...


Animals of America

portfolio1 portfolio2 portfolio3 portfolio4

Lewis Falls

Lewis Falls in the Fall time...

Bighorn Sheep Ram Herd

Summer herd of bighorn sheep rams...

Grand Geyser

Grand, on right, Turban, and Vent Geyser erupting...

Firehole River

Firehole River with steam rolling out of Grand Prismatic and Excelsior Geysers in the background...

small portfolio1 small portfolio2 small portfolio3 small portfolio4
themed object
Learn. Knowledge is power. Power to help others.
get in touch

Grizzly Bears in Yellowstone

Grizzly bear swimming across the Yellowstone River

There are about 150 grizzly bears within Yellowstone National Park. Grizzly bears are one of two types of bears in the Park, they are joined by numerous black bears. Grizzly adult male bears weigh in at 300 - 700 pounds while the female weighs 200 - 400 pounds. The Ursus arctos horribilis (grizzly) is bigger than the black bear, Ursus americanus. Both species of bears can live 15 to 30 years.

How can you identify a grizzly bear? Grizzlies have a shoulder hump and their rump is lower than their shoulder. Their hump is pure muscle used to dig roots, tubers, and turn over logs or boulders. Their face has a dished-in profile, with a depression between their eyes and the end of the nose. A grizzly bear's ears are short and rounded.

How fast can a grizzly bear run? What do you think 5, 10, 15, or 45 miles per hour? (See the answer below.)

Females may deliver one to three, and occasionally four, cubs in January or February. Did you know that the mother starts hibernation and awakens to 2 month old cubs. The female doesn't normally arouse during delivery.

Grizzly mother with twin yearling cubs

This mother grizzly with her twin yearlings were in the meadow along the Grand Loop road between Norris and Mammoth Hot Springs south of Bunsen Peak Trail. We watched them as they wandered about 1/2 mile from the ridge to within 15 feet of the road. After setting there for 15 minutes or so they reversed course and went back the way they came.

Grizzly cubs will stay with their mothers for 2 winters after their birth year.

While in Yellowstone you can often see the same bear(s) in the same general area day after day. Often people will park in the general area for hours in the hope of getting pictures of the bears.

Always remember that bears are wild animals and will viciously protect their cubs and food. Prior to moving into bear country make sure you know how to act for your own safety and to decrease disturbing the bear(s). Grizzly walking across snow

Grizzlies are know to be agile and can run up to 45 mph. What do you think. Do you think could you stay ahead of the bear in a foot race? As the saying goes "I only have to be faster than the person with me."


Please note that all pictures displayed on this site are for educational purposes on this site only. Please link people to this page if you want them to see the image(s). If you have a need for these pictures please follow the link below to purchase a print or click here to email Awareness Productions to discuss usage of a picture in your project(s).

All images are registered by Fay Yocum. All Rights Reserved. No rights granted unless in writing by Fay Yocum


To view more pictures or purchase pictures by Fay click here.

slide up button