Interagency Grizzly Bear Study Team (IGBST)

See below for IGBST Annual Reports from 1989 - 2020, which are available as PDFs; the latest version of Adobe Reader or similar software is required. Click on links below to access reports. Annual reports starting in 2021 can be found at the Interagency Grizzly Bear Committee (IGBC) website (click green button below). The IGBC also has the full set of IGBST reports.

The Interagency Grizzly Bear Study Team (IGBST) is an interdisciplinary group of scientists and biologists responsible for long-term monitoring and research efforts on grizzly bears in the Greater Yellowstone Ecosystem (GYE). The team was formed by the Department of the Interior (DOI) in 1973 as a direct result of controversy surrounding the closure of open pit garbage dumps within Yellowstone...

A heated debate began in the 1960s and 1970s and grew to a national scope concerning the grizzly bears in the GYE. For decades, grizzly bears were allowed to rummage through garbage dumps searching for food. As early as the 1940s, some researchers suggested closing the open-pit dumps within Yellowstone National Park. In 1963, the Advisory Board on Wildlife Management in the National Parks released...