Population Dynamics

Wolf distribution and population dynamics are monitored in Yellowstone National Park, primarily through aerial telemetry, to determine whether the criteria for delisting wolves as an endangered species are being met. Monitoring flights are conducted weekly, weather permitting, to locate as many wolves as possible. Wolves are counted in early and late winter, and radio collars are tracked year-round. Pups are counted at dens and again in early winter to determine over-summer pup mortality. Staff follow up on all wolf mortalities to determine cause of death.