Yeah false eyes are really quite common in amphibians. We normally call them inguinal spots, which is a fancy way of saying hip spots. They show up in hundreds of species across numerous families. Few are quite as developed as Physalaemus nattereri, but e.g. Plethodontohyla ocellata is also pretty impressive.
[this fantastic figure from Noble's Biology of the Amphibia, 1931]
Do you have a favorite threat display pose from a bug? I know its bad if the animal is stressed but also so many mantis ones are just so pretty and silly (up go the arms!), it makes me wonder what other bugs have got goin on
I do love mantid threat displays! My favorite species (Idolomantis diabolica) has a beautiful threat display:
Ahhh I’m scared! Photo by also_sprach_susscrofa
But there are a lot that are super fun, especially the ones with false eyes on the wings. The katydid Pterochroza ocellata comes to mind:
Neat :) Photo by paulcools
Honorable mention to the ilia underwing moth caterpillar who, when threatened, flips onto its back to reveal a startlingly purple/pink belly!