cicada --- savannah, ga
"A cicada rapidly vibrates [its] membranes, and enlarged chambers derived from the tracheae make its body serve as a resonance chamber, greatly amplifying the sound. They modulate their noise by wiggling their abdomens toward and away from the tree that they are on. Additionally, each species has its own distinctive song."
--- The Audubon Society Field Guide to North American Insects and Spiders, Lorus and Margery Milne