What are Cicadas?
cicadas are a type of insects with the ability to fly in their mature form. They are often heard, but they are not visible and many are familiar with their songs in July and August when men stretch and relax their tymbal, causing stridulation that can reach up to 106 decibels.
species differ in appearance, but everything can be identified by the sound they make and their transparent vein. Their big eyes are wide apart and their antennas are short. Most adult cicadas are 1 to 2 inches (2 to 5 cm). However, some, like Malaysian Pomponia Imperatoria , are much larger at 6 inches (15.24 cm). There are thousands of different species in the world, 200 in the US, but the group as a whole can be divided into two sets based on life cycle: periodic and annual. Women dig a small hole in the tree and lay eggs that have the same appearance as rice grains. Initially young sucking liquids from the tree, but as they mature, let the tree open and dig into the ground until they find the root of the tree,to which they can connect. At this stage, they are called nymphs and remain underground attached to the root until they throw their exoskeleton and become mature adults or imagia.
What changes between annual and periodic cicadas is the time during which the nymph remains underground and feeds on the liquid of tree roots. The annual cicadas tend to live underground for two to seven years as nymphs before they become representatives. On the other hand, periodic cicadas can spend up to 17 years as nymphs before they appear to spend two months of maturity as adults.
Another difference between these two types is the difference in the way it appears. The annual cicadas tend to achieve adulthood and appear in small numbers. On the contrary, the periodicas as the American Magicada Hatch in a huge number. Scientists suggest that this massive edition is caused by evolutionary survival tactics. A large number of periodic ideas will be fedPredators, but also ensure that this species can maintain.
The emergence of periodic ideas has somewhat mystical quality. For example, a child will not see one of them until it is an adult. In fact, scientists have noted that the Cicadas life cycle seems to be uniquely designed to ensure survival. Both years and periodicals tend to hatch and grow into maturity in prime numbers, 2, 3, 5, 7 and to 17th. The fact that predators like birds and moths cannot depend on the annual supply of these insects in their diet is less likely to be considered part of the food chain for non -Luman animals.
The unlikely predator of cicadas are human beings. Many Indian tribes, Japanese, Australians and Papua Awards -the Guinean Award Cicadas Jakokulinářské plekům. The ancient Greeks also enjoyed this insect as a snack. In China, tea is made of NYMF's skin and gives rise to crying children to calm them down.
whether a person is eating or simply appreciating the singing of cicadas, the lives of this insects hold mystery for most of the past and contemporary cultures. Some, like Navajo, consider Cicadu a sign of rebirth. Japanese dragon manufacturers suggest some dragons in the form of cicadas and many other Asian cultures consider insects a sign of good wealth. Most cultures celebrated these insects in songs, poetry or folklore, so the complex life of cicadas clearly maintains a special place in our view of the world.