Giant Prickly Stick Insect

The main thing that happens here is when they are born because they are then quite susceptible to predators. What they then go and do is that they look like spider ants and the idea is that any bird that hates them will go nowhere near them and it increases their chances of being able to actually develop into a fully grown insect.
This Post Belongs To Insects which mimic ants but are not ants