Stick insects, also known as leaf insects or ghost insects, are some of the largest insects in the world, consisting of about 3,000 species. They are also some of the longest ones in the order Phasmatodea. 

The longest stick insect belongs to the genus Phobaeticus, including the species Phobaeticus serratipes  and Phobaeticus chani, each with a body length of up to 21 in.

However, the world’s longest insect record belongs to a newly discovered species called the Phryganistria chinensis. This stick insect has a body length measuring 25 in. It was found and bred at the Insect Museum of West China.

This big insect has a flat tubular appearance resembling a stick. It can easily hide from predators by blending into branches and leaves. The stick insect can play dead on tree branches to defend itself until the predator loses interest. It may even lose a leg to escape predators and regenerate it later.