The eyes of the red-eyed tree frog are the its most prominent feature, however, the frogs’ bodies are also a brightly coloured lime green, sometimes with yellow or blue markings. They have white bellies and throats but their sides are blue with white borders and vertical white bars. Their feet are bright red or orange. Sometimes, depending on their mood, red-eyed tree frogs turn dark green or reddish-brown.  The red-eyed tree frog uses a defense mechanism called "startle coloration" to deter predators.  When the frog closes its eyes, its green eyelids help it to blend in with the leafy environment. If disturbed, it suddenly opens its eyes to temporarily paralyze the predator, allowing it a brief chance to escape. Red-eyed tree frogs have cup-like footpads that help them to climb and cling to leaves in the rainforest canopy. They hunt at night for insects and smaller frogs. Male red-eyed tree frogs can grow up to 5cm long and females can grow up to 7.5cm.