This is generally on the ground. When spring arrives, the new cricket, or nymph, hatches looking very muck like an adult cricket, only minus his or her wings. Through several molts, casting off their skin, they grow larger, and develop their wings. The singing of the cricket is the main reason so many people throughout time have both welcomed them into their homes, where most insects are not wanted, and believed them to bring good fortune and luck. They make their beautiful song by rubbing parts of their body together.
Crickets use their otherwise often useless wings to make their song.
While occasionally this is accomplished by the female of the species, the majority of the time it is the males. They sing to call in mates, and to warn other males that they have entered the territory of another male. An added benefit of their chirping to us, as colder weather arrives, is to listen to how many chirps they emit each minute. By dividing this count by 4, and adding the number 40, you will arrive at the approximate Fahrenheit temperature outside. If you believe that crickets are vegetarians, you would only be part right.