The first successfully radio instrumented grizzly bear in Yellowstone National Park. Grizzly No. 40 or called "Marian" by John & Frank Craighead. The bear was named after the engineers' wife who designed the collar transmitter.
The Craighead brothers were the pioneers of grizzly bear research in the Greater Yellowstone Ecosystem. Their successful implementation and deployment of radio collars on grizzly bears revolutionized the ability to track free roaming populations of animals in the wild. Photo credit: Frank & John Craighead
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AuthorTyler Brasington is a native born and raised Pennsylvanian, yet proud current Wisconsin resident. He graduated from the University of Wisconsin-Whitewater with a B.S. in Environmental Science. Currently, Tyler is pursuing his masters in Natural Resources with the University of Wisconsin-Stevens Point. He has worked in Yellowstone National Park under the guidance and supervision of Dr. George Clokey and Dr. Jim Halfpenny. Disclaimer: The information and views expressed on this page do not necessarily represent the views of the Department of Interior, US Geological Survey, National Park Service or the United States Government.
The Greater Yellowstone Grizzly Project
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February 2021
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