Christopher Kane, Naval Facilities Engineering Systems Command and 36th Civil Engineer Squadron natural resources specialist, looks up at the last adult Serianthes nelsonii tree on the island at Andersen Air Force Base, Guam, Feb. 2, 2021. - Christopher Kane, Naval Facilities Engineering Systems Command and 36th Civil Engineer Squadron natural resources specialist, looks up at the last adult Serianthes nelsonii tree on the island at Andersen Air Force Base, Guam, Feb. 2, 2021. Serianthes nelsonii is a large tree endemic to Guam and Rota of the Mariana Islands. Only one mature tree exists on Guam, while 121 mature trees have been identified on Rota since 1984. (U.S. Air Force photo by Senior Airman Aubree Owens)