Phrynichus pusillus is a small insect belonging to the order Phasmatodea, commonly known as stick insects or walking sticks. It is native to Southeast Asia and is characterized by its slender body and long, thin legs, resembling a twig or branch. The species is sexually dimorphic, with males typically being smaller and having shorter wings than females. Phrynichus pusillus is primarily herbivorous, feeding on leaves and vegetation in its natural habitat.