Rene Tam, a University of Illinois graduate student under the supervision of U.S. Army Engineer Research and Development Center (ERDC), Construction Engineering Research Laboratory (CERL), Dr. Jinelle Sperry, wildlife biologist with the CERL’s Threatened and Endangered Species program, uses radio-telemetry to follow fruit-eating birds in Oahu, Hawaii, March 23, 2018. The collaborative efforts of the ERDC-CERL’s team help establish the Department of Defense’s ability to properly train on military installations and balance ecosystem health. (U.S. Army Corps of Engineers photo)