Green is pretty easy to find in nature. Well, here on earth anyway. Mars is another story. This first image is a Green Metallic Bee. It really does look like a piece of shiny green metal as it flies around.
The second is a fairly common caterpillar of the Sphinx Moth but, this one has a surprise. It has been parasitized by a small ichneumon wasp – Cotesia congregata. The wasp lays it’s eggs in the living caterpillar. When the eggs hatch, they come though the skin of the caterpillar and pupate on the outside.
The idea is kind of yucky but nature is like that sometimes.