Did you hear that sound? If it’s late summer, you may hear male grasshoppers calling to females in search of a mate. Though their noises may remind you of singing, these insects are actually making noise by rubbing their hind legs against their front wings! This process is more like playing a drum than singing. Grasshoppers don’t have ears on their heads! The long antennae you see are for other senses like smelling and touch. Instead, grasshoppers have special organs just under their wings, that vibrate in response to sound waves! These are called tympanal organs. Each species of grasshopper has its own rhythm that distinguishes it from others.