molting Cicada: A large homopterous insect with long transparent wings, occurring chiefly in warm countries. The male cicada makes a loud shrill droning noise after dark by vibrating two membranes on its abdomen.
Small organisms, like insects, have problems with sound short circuiting, where the insect's body is smaller than the wavelength of sound they emit, so no sound is spread outwards. In order to make a sound with a shorter wavelength, insects need what is called a frequency multiplier. For example, cicadas have tymbal muscles under their wings that are pulled back and vibrate quickly to produce higher frequency sounds, which are then amplified by a semi-hollow body.