Pterochroza ocellata, the peacock katydid, is an insect in the family Tettigoniidae from the Amazon rainforest in South America.

The species is a leaf-mimic katydid; when it is in repose its camouflage resembles a diseased or dead leaf.

If in spite of its camouflage it is threatened, the katydid exposes its hind wings, displaying two conspicuous eye spots.

When a female appears, the katydids first inspect each other with their antennae, then shake their bodies to gauge each other's size and strength.

The spermatophylax is a gelatinous structure that contains the male's sperm cells as well as nutrients in the form of carbohydrates and proteins as a contribution towards the survival of the female and the offspring.