Guardian Of The Hallway. #Australia #Sydney #wildlife #insect #mantid #mantis #prayingmantis The praying mantis is an amazing insect that can be kept as a pet. A praying mantis can catch other insects with its strong front legs. The front legs are lined with spikes and close in a certain way to have a firm grip on the prey. A mantis has a mobile head that can turn around like humans can, large eyes, large front legs to grab prey and four legs meant for walking. Praying mantids vary in adult length between 1 and 16 cm. Praying mantids exclusively eat other insects by catching them with their forelegs. They do not use poison but eat the prey alive while they hold it firmly.