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Flight Observation Units, also referred to as Bear Observation Areas (BOAs), were delineated by the Interagency Grizzly Bear Study Team (IGBST) to facilitate systematic aerial monitoring of the grizzly bear population within the Greater Yellowstone Ecosystem. Flight units were last updated in 2014 to depict 54 distinct observation areas spanning the spatial extent of the Demographic Monitoring Area established for the Yellowstone grizzly bear population.


    map background search result map search result map Flight Observation Units for Monitoring the Yellowstone Grizzly Bear Population Flight Observation Units for Monitoring the Yellowstone Grizzly Bear Population