The Giant Prickly Stick Insect (Extatosoma tiaratum) from Australia is a very popular stick insect as a pet. It is big, pretty and very easy to rear. You will mostly find this species of stick insect in colors of brown. Uniformly light brown or light brown with some darker spots are the most common colors. But did you know you can also raise green or even lichen-like individuals? Especially the lichen variety is very rare and very impressive.