Yellowstone Grizzly Deaths Highest in Four Years


According to statistics from the United States Geological Survey (USGS), 2012 saw the highest number of grizzly bear deaths in the greater Yellowstone area in the past four years. Researchers recorded a total of 51 bear deaths this year, compared to 44 deaths in 2011, 50 deaths in 2010 and 31 in 2009.


Statistics about the deaths


By Gender

Male: 20

Female: 11

Unknown: 20


By Age

Adult: 20

Subadult: 6

Yearling: 1

Cub of the year: 12

Unknown: 12


By Location

Inside Yellowstone National Park: 10

Inside Grand Teton National Park: 2

Inside Bridger-Teton National Forest: 8

Outside of national parks (includes those in BTNF): 39


By Cause

Known natural: 9

Likely natural: 6

Known human-caused: 29

Probably human-caused: 5

Unknown/other: 2


Among the bears killed this year was “Brownie,” a yearling cub of Grand Teton National Park’s well known, mother bear known as “399.” Brownie was the only human-caused casualty within a national park (the other 28 known human-caused deaths were outside of Yellowstone and Grand Teton National Parks). He died as a result of trauma from a vehicle strike.


For more information about grizzly mortality rates for the past four years, visit the USGS website.





Comment Feed

2 Responses

  1. 29 Bears Deaths Caused by Humans & Probably 5 more. 34 Caused By Humans!!! Think About That! How Terrible!! Human’s have to be more careful! Did you ever drive through YNP & see the Bears with their young? I did & I will never forget the touching experience. Poor Brownie, do we know what happened to 399’s other cub that was nearby Brownie when killed? Please Drive Carefully around our parks!!! Maybe next year the Total Deaths will be “0”!!!!!!!!!!!!

  2. Just read the USGS website why are the bears being killed by management removal? Why aren’t they being tranquilized & moved to other areas if they are causing problems because they are hungry? Why aren’t there fences with barbwire around the cattle, they should be taken care of by the ranchers. The bears are hungry they don’t know the difference between wild animals & cattle, at least the fences would help. Why are they being killed for no reason????

Some HTML is OK

or, reply to this post via trackback.