Yellowstone Grizzlies by the Numbers

Yellowstone Grizzly Bears By the Numbers

The grizzly bears that inhabit the Greater Yellowstone Ecosystem have played an important role in one of the nation’s greatest endangered species success stories. Since 1975, the bears have been beneficiaries of the Endangered Species Act that enabled the grizzly population to beat all odds after teetering on the brink of extinction. It grew from 136 bears in 1975 to around 700 in 2016, although estimates range from 674 to 839.

On March 3, 2016, the United States Fish and Wildlife Service announced its proposal to delist the Yellowstone area grizzlies, which includes Grizzly 399, from the federal threatened species list. It is expected to make a final decision by the end of 2016.

The Numbers

50,000
The number of grizzly bears that roamed between the Pacific Ocean and the Great Plains during Lewis and Clark Expedition, 200 years ago.

674-839
The approximate number of grizzly bears in the Greater Yellowstone Ecosystem according to the National Park Service in 2016. No one knows the exact number.

150
The number of grizzlies that live within the boundaries of Yellowstone National Park in 2016.

More than 524
Of Greater Yellowstone Ecosystem grizzlies live outside Yellowstone National Park.

22,500 square miles
Is the range of the Yellowstone area grizzly bears, which has doubled since 1975 – that’s an area larger than Massachusetts, Rhode Island and New Hampshire combined.

37
Grizzly bear populations were present in the lower 48 states in 1922.

31
Grizzly bear populations were extirpated by 1975.

136
Grizzlies lived in the Greater Yellowstone Ecosystem in 1975.

10
is number of years it takes a female grizzly to replace herself in the population.

1,000
Grizzly bears live in the Northern Continental Divide Ecosystem, which stretches from Kalispell, Mont., all the way up into Canada and includes Glacier National Park.

DSC_0033

One thought on “Yellowstone Grizzlies by the Numbers

  1. Reblogged this on GarryRogers Nature Conservation and commented:
    Excellent post. The attrition of open space, wildlife, and natural ecosystems occurs slowly and quietly. Without vigilance and unrelenting effort, the attrition is unstoppable. Always, the urge to obtain immediate convenience or profit obscures the potential long-term consequences of our actions. Learning to take the long-term view is essential for managers of natural systems.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s