Hymenopus coronatus, the Orchid Mantis
This species is characterized by brilliant and beautiful coloring and unusual structure; their four walking legs resemble flower petals, and the coloration of the bodies tends to match the environment in which they were raised. H. coronatus shows some of the most pronounced sexual dimorphism of any species of mantis; the males are generally less than half the size of the females. Young nymphs resemble ants with orange and black bodies. As the mantis grows in its environment, its color comes to more closely match the coloration of its surroundings with each passing molt. It has been theorized that humidity and intensity of light play a large role in the final coloration of the adult.
(Various photos from Google Images)