LOCUST--INSECTSLocust are NOT found in the United States, but in Australia, the Middle East and Africa. Commonly assumed to be locusts are cicadas. Cicadas are usually found in trees during the summer after emerging from their shells and creating what some people describe as an obnoxious chirping, piercing, grating sound from dusk to dawn. Others love the sound. In Australia, during summer, the noise of millions of cicadas in the gum trees can be so intense as to drown out the sound of passing traffic on a busy highway.