It feeds on other mantises, Insects such as butterflies, beetles, grasshoppers, flies & crickets. At the bottom of this post there is a link where you can see pictures of a mantis that has caught a hummingbird. It uses it's fore limbs equipped with razor sharp spines to deliver a fatal blow that will penetrate it's prey & it quickly bites the neck of the prey before starting to eat.
The one I saw was brownish in colour & they vary from Green to Pink & flower mantises are magnificently beautiful with flower like appearance. This is essential to it for it's survival as there are so many predators such as Birds & spiders that feed on them. Also Mantises use their camouflage to catch their prey, as unwary victims pass-by without noticing it.