Whooping cranes (Grus americana) migrate twice each year through the Great Plains in North America. Recovery activities for this endangered species include providing adequate places to stop and rest during migration. USGS scientists have made initial estimates of stopover site use intensity, which has allowed researchers to identify areas across the migration range receiving proportionally greater use by whooping cranes. Data used for these estimates were acquired from 58 unique individual cranes fitted with platform transmitting terminals that collected global position system locations. Initially, results will be used by the U.S. Fish and Wildlife Service and other interested parties in evaluating the Great Plains Wind Energy Habitat Conservation Plan.