They are insects that are the main food for reptiles and they need to be well fed or they will eat each other. They can eat lettuce, collard greens,and rolled asts with fresh fruit. You can obtain thease crickets from Pet Co. House crickets or feild crickets are a good choice. To house them us a aqaurium with a wooden screen lid.This is a house cricket  www.the-piedpiper.co.uk/ th2f.htm . They are perfect for reptile prey and easy to obtain.