Hemeroplanes triptolemus, Sphingidae from the Amazon rainforest near Puyo, Ecuador. When disturbed this larva of a sphinx moth expands and exposes the underside of the first body segments, mimicking a snake head with black eyes and even light reflections. Sometimes it also strikes like a snake to deter predators such as lizards or birds.
Caterpillar Mimics Snake
Video by DrAndreasKay