Generally only things like fleas, mosquitos, tsetse flies etc bite humans deliberately, most others tend to sting eg fire ants, bees etc.

Here's one for you to conjure with - The Sexton beetle, these pair up to bury corpses of other animals (eg mouse, rat) they find, and lay the eggs on the corpse as it decomposes in an underground chamber the beetles have dug for it. However you would have actually to look (or at least smell) dead for them to bother with you.