Mahlac Cave, Guam, Fieldwork
USGS scientist, using a red LED headlamp, sets up Axis thermal cameras in Mahlac cave entrance, Guam. Thermal camera setup includes high resolution thermal cameras and lower power, time lapse thermal cameras to visualize and map locations of roosting swiftlets and nests. PC: E. Paxton, 2019.
Photo provided by USGS scientist Eben Paxton.