The call of the robin can be written as squeak. male robin's belly on the two small round pieces called the sound cover, the sound cover on the inside of a transparent film, this film is called the valve membrane, in fact, the valve membrane issued by the sound, people use megaphones to expand their own voices, the sound cover is equivalent to the cicada's megaphone as the contraction of the back and forth to expand the sound, it will be issued a squeak call, and female robin's belly on the absence of the sound cover and the valve membrane, so the female robin will not call, also called dumb cicadas. It is also called a mute cicada.

Introduction of the robin

The afterlife of the cicadas, cicadas are a class of organisms in the phylum Arthropoda, class Insecta, order Hemiptera, family Cicadidae. There are about 3,000 known species.

The cicada's life passes through three stages: fertilized egg, larva, and adult. As summer progresses, fertilized eggs laid early in life hatch into larvae, which burrow into the soil and feed on the sap of plant roots and stems.

As the larvae mature, they crawl to the ground, shed their golden exoskeletons, and feather into the winged adults we commonly see. Although adult cicadas only survive for a few months, the larval stage is capable of surviving in the soil for many years; for example, the larval stage of a cicada with a six-year lifespan takes up five years of its life.