(Photo: Bresseel & Constant, Royal Belgian Institute of Natural Sciences)
This is Phryganistria heusii yentuensis, a newly-documented stick insect native to Vietnam. It's 32 centimeters long or 54 centimeters when stretched out. These dimensions make it the second largest insect in the world.
The Royal Belgian Institute of Natural Sciences found it in Vietnam. The researchers found the insect by placing a sheet around a bush, then hitting the bush with a stick until the insect fell out. They observed a pair for a few days, including their mating habits, and cataloged their findings. The researchers plan to continue searching Vietnam for other stick insects that have not yet been documented.