Knowledge about cicadas 5, knowledge about cicadas

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Habits of cicadas: 1. The larvae of cicadas live in the soil and have a pair of strong digging forefeet. The sap of the roots of the plant is sucked by the sucking device of the stinging and sucking device, which weakens the tree momentum, makes the branches die, and affects the growth of the tree.

2. When a black crack appears on the back of the cicada chrysalis, the molting process begins, the head comes out first, and then the green body and wrinkled wings are revealed, and it stays for a moment to harden the wings and darken the color, and then it begins to take off.

At the end of the month, the larvae begin to emerge into adults, and the newly fledged cicadas are green in color and have a maximum lifespan of about 60 to 70 days.

4. The sky screams loudly in the trees, and the sap is sucked by the mouthparts of the needle, and the larvae inhabit the soil and absorb the sap of the roots, which is harmful to the trees.

5. Whenever the cicada is thirsty and hungry, it will always use its hard mouthparts to insert into the trunk of the tree to suck the sap all day long, and inhale a large amount of nutrients and water into its body to prolong its life.

6. The male cicada will chirp, its articulator is in the abdominal muscles, like a big drum covered with a layer of tympanic membrane, the eardrum is vibrated and makes sound, because the vocal muscle can be retracted about 10,000 times per second, the cover plate and the tympanic membrane are empty, which can play a role in resonance, so its sound is particularly loud.

Cicadas belong to the class Insecta, Homoptera, and Cicada family.

After metamorphosing from eggs into cicada ants, they live underground for at least 4 years, and some even more than ten years can be transformed into cicada pupa. When unearthed, the forelimbs with serrated teeth were used to dig out the ground from the soil less than 30 cm deep, climb the tree trunk or other climbable objects, and with the help of air drying and their own ability, the crack line from the top of the head to the back ** metamorphosed and turned into an adult cicada. After sucking the sap of the tree and surviving for more than 70 days, it will die of aging.

Adult cicadas and larvae are selective in sucking sap, mainly poplars, paulownia trees, elms, and fruit trees.

The life of the cicada in the tree is only about 3 months, so they need to mate and lay eggs as soon as possible, and 1 male cicada mates 5 8 female cicadas to complete their mission. Each female cicada can lay 800 1000 eggs, they often choose 4 5 cm thick young branches, first use the ovipositor to pierce the bark, the ovipositor into the xylem of the young branch, resulting in clawed egg holes, and then lay the eggs in it, arranged in a single and double row or "Y" shape, and then fly to another branch to lay eggs, until the eggs are laid, that is, the mission is completed.

Classification: Belongs to the family Homoptera.

Number of species: There are about 3,000 species in the world, and there are about 70 species known in Taiwan.

Life history: egg, nymph, adult.

Appearance characteristics: Cicadas are a large class of homoptera insects, with a maximum body length of more than 6 cm, and the most important appearance characteristics are: a pair of blazing compound eyes on the wide and short head, and a pattern similar to the face of a Chinese opera on the dorsal side of the chest; When it perches, two pairs of transparent wings are provided on the ventral dorsum and are ridge-shaped.

Feeding habits and habitats:

Usually survive on the sap of various parts of the plant. The mouthparts are pierced into the bark of the tree to suck the sap.

Singing: The purpose is to define the bell or attract the female cicada, and when the male and female hear these whining sounds of a specific frequency and rhythm, they will actively fly to the trunk of the tree where the male cicada rests and mate with him.

Nymph habits: After mating, female cicadas lay eggs on dead branches of plants, and after hatching, the baby nymphs fall to the ground and burrow into the ground. Adults of cicadas do not live long, but nymphs stay underground for at least a year.

The flashlight will soon be able to find the nymph that has just emerged from the ground. After it has climbed to the selected location and no longer moves its position, in just half an hour, it will perform the whole process of molting and feathering. Both females have poisonous needles on their tails.