Book 30, Question 54
How do diving beetles and backswimmers breathe underwater?
These insects need air, so they carry their own.
A diving beetle tucks a bubble of air under its wing covers and uses it like a scuba tank. A backswimmer swims upside down, rowing with its long back legs, and holds a silvery film of air on its belly. Both come to the surface now and then to refill. They can pinch, so look but don't touch.