The males of this large plant-eating family have thick thighs, often with spikes on them. Theses parts of the leg are used to fight other males in order to win a female.
They make a loud noise when they fly or when they are bothered. A foul odor can also be emitted as a defensive adaptation.
The majority of species are found in the south United States, but they range across the entire North American continent. Some prefer arid deserts, while others prefer humid, more tropical climes or temperate forests.
All adults feed on plant juices.