Try swimming with 100 eggs on your back and you’ll soon respect the giant water bug for being a great dad. Although most giant water bugs lay eggs on underwater objects, the female of some species sticks her fertilized eggs in rows across the male’s back. (The waterproof glue she produces is just right for the job.) But all those eggs on a bug’s back make swimming slow and flying impossible. What’s worse, the mother bug just takes off, leaving the dad to struggle along as a single parent.