This feature class contains pest and fire mortality mapped during surveys from 1973 to 2019 in California and USFS Region 5. Includes estimates of trees per acre and number of trees affected, tree species affected, damage type, and damage causing agents when available. Data collected in or near California by USFS Regions 4 and 6 are also included. Detailed methods, standards and guidelines are available at the Forest Health Technology Enterprise Team website: http://www.fs.fed.us/foresthealth/technology/ads_standards.shtml