Red-eyed tree frogs (Agalychnis callidryas) are natives of rainforests ranging from Mexico to Central and northern South America. They are nocturnal hunters that spend the day sleeping on the bottoms of large leaves. Despite their conspicuous coloration, these frogs are actually not venomous. Instead, their colours are thought to be an adaptation for startle display – when disturbed, they flash their bulging red eyes, and reveal their huge orange feet and bright blue-and-yellow flanks, which may startle a predator long enough to offer a precious instant for the frog to spring to safety. During the day, they remain motionless, covering their blue sides with their back legs, tucking their feet under their bellies, and shutting their eyes so that they appear almost completely green and camouflage among the foliage. The vibrant colors may also serve to over-stimulate a predator’s eyes at night, creating a confusing ghost image that remains behind even as the frog jumps away.