This amazing animal is an adult female DEAD LEAF PRAYING MANTIS from the rainforests of Malaysia.  Their remarkable body shape, colouration and pattern enable them to superbly camouflage themselves amongst decaying crumpled leaves, hence their common name!  As you can see below they really do resemble crispy dead leaves, a superb example of camouflage.

Like all species of praying mantis the dead leaf is a predator, sitting in wait and using its keen eyesight to look for smaller animals flying or walking around it.  Once a suitable prey item is spotted and comes close enough the mantis launches forward with its two powerful front legs, capturing the animal using the spines on these legs which you can see in these pictures below:

If this species is disturbed or feels threatened it can put on a very impressive display to warn off potential predators.  It opens its outer wings very wide to reveal a second, absolutely beautifully patterned dark pair of wings which would be very offputting to a would-be predator, and it is a bluff designed to scare them away!