Mantises are an order (Mantodea) of insects that contains over 2,400 species and about 430 genera in 15 families. The largest family is the Mantidae ("mantids"). Mantises are distributed worldwide in temperate and tropical habitats. They have triangular heads with bulging eyes supported on flexible necks. Their elongated bodies may or may not have wings, but all Mantodea have fore legs that are greatly enlarged and adapted for catching and gripping prey; their upright posture, while remaining stationary with fore arms folded, has led to the common name praying mantis.