Provisional documented known and probable grizzly bear mortalities in the Greater Yellowstone Ecosystem, 2022 (Provisional Release, updated 2022-05-18)

These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data. The Interagency Grizzly Bear Study Team (IGBST) evaluates mortalities for population segments within the DMA by deriving estimates of total mortality for independent-age (2 years or older) females and independent-age males, including estimates of unknown/unreported mortalities based on Cherry et al. (2002). We then determine the total annual mortality rate for these segments as a percent of their respective population estimates. For dependent-age bears (less than 2 years old), we determine the percent of human-caused mortality relative to size of the population segment but do not include estimates of unknown/unreported mortality. Mortality data in this data release represent the individual records documented by the Interagency Grizzly Bear Study Team on an annual basis. Included are all mortality records for the current year (2022); records are updated frequently as new documented mortalities are reported to us. Mortality records for 2015-2021 are available in the following USGS data release: https://doi.org/10.5066/P9U1X0KF. Mortality records prior to 2015 can be obtained from annual reports from the Interagency Grizzly Bear Study Team available via the IGBST website (https://www.usgs.gov/centers/norock/science/igbst-annual-reports). Literature cited: Cherry, S., M. A. Haroldson, J. Robison-Cox, and C. C. Schwartz. 2002. Estimating total human-caused mortality from reported mortality using data from radio-instrumented grizzly bears. Ursus 13:175-184.