The robin's tortoise, also known as the cicada, will come out of the ground when it is about to be feathered. Generally in the spring warmth, the larvae clumps of soil up to move, sucking the sap of plant roots, and in the fall and winter, then deep into the soil again to avoid the cold.

The scientific name of the robin's tortoise is cicada, a representative species of the cicada family of insects. The male's abdomen has an articulator, which can continuously emit a sharp sound. The female does not make a sound, but has a hearing apparatus in the abdomen. Larvae live in the soil, sucking the roots of plants, and adults eat the juice of plants. Cicadas belong to the incomplete metamorphosis, from egg, wakame, after several molts, without passing through the chrysalis period and become adults.

Cicada growth and metamorphosis:

1. Grasshopper larvae live their entire lives in the soil. When they are about to be feathered, they drill out of the soil surface at dusk and at night, climb to the tree, then grasp the bark and molt to feather.

2, the end of June, the larvae began to feather into adults, the longest life expectancy of about 60 ~ 70 days. late July, the female adult began to lay eggs, in August, the first and middle of the egg-laying season, the eggs are mostly laid in the top of the branch 4 ~ 5 mm thick.

3, the female adult spawning, first with the spawner to pierce the bark, the spawner into the branch tissue, resulting in claw-shaped egg holes, and then spawned in the xylem. Each spawning hole has 6 to 8 eggs. A branch covered with cicada eggs, more than 90 grains.

4. The eggs laid hatch by mid-June of the following year. After hatching, the larvae fall from the branch to the ground, and then drill into the soil. Larvae live in the soil for a number of years (cicada larvae in the forests of the east coast of North America can live underground for up to 17 years),*** molt 5 times.

5, whenever the spring warmth, the larvae that is upward movement, sucking the sap of plant roots, fall to winter, then deep into the soil to avoid the cold.

6, young larvae body is white or yellow, very soft, forehead significantly expanded. Older larvae body is harder, yellow-brown, wing buds are very developed, from the top of the head to the back of the thorax in the center of the back, there is a molt line, for the feathering of the adult crack line.

Medicinal value:

The skin of the cicada is said to be cicada molt, rich in chitin, isoxanthopterin, erythrocyanidin, adenosine triphosphatase, often used to treat externally induced wind-heat, coughing and hoarseness. Sore throat. Wind rash itch, red eye cataract, tetanus, pediatric epilepsy, crying at night, etc. According to the "Chinese Herbal Medicine" records, there are also beneficial to the sperm and Yang, cough and Tsu, protect the lungs and kidneys, anti-bacterial and antihypertensive, baldness and inhibition of the disease to be and so on.