camouflage
Leaf insect.
Camouflage is the means by which some animals blend in with their natural environment, usually by resembling their surroundings in color. Camouflage enables animals to conceal themselves from their prey or to protect themselves from predators. The leaf insect is a notable example. It is flat and green and the female has large leathery forewings with markings that resemble a pattern of vein leaves.