****The water scavenger is a small Western Hemisphere beetle that has earned its three nicknames--water scavenger, water beetle, and great diving beetle. The water beetle has wings that allow it to fly, and capture air in between them. The great diving beetle has a tendency to dive into the ground underwater to avoid predators. They usually come out of their newly dug tunnel when it is safe.
****The backswimmer is the only water beetle smaller than an inch, and it bites. But why does it bite? It's very simple, because it is the one beetle that is a favorite delicacy of larger insects. So why does it bite humans? Consider the backswimmer as a frightened baby dog. What will it do? Bite, of course. All the backswimmers think your hand is a larger insect.
****The whirligig beetle is a very strange insect-it spins in circles. Why? The whirligig beetle spins to detect prey on the surface. When a fly lands in ripples of the whirligig beetle, the fly hits the ripples causing some more ripples, but back to the whirligig beetle, giving it the information of where the fly's impact was. The whirligig beetle has two sets of eyes, instead of two. Why? That way, they can see their prey if it's over (flies, land insects), or under the water (water fleas, sunken flies, etc.) The whirligig beetle also gives off a strong odor when caught. If you're wondering why, it's kind of obvious, to have the predator release it so it doesn't die.