taken by canon 7d and 100mm f2.8L speed 1/100sec f14 iso160 Now that we will miss song of ... How surprised each summer when I hear this incredible and so synchronized concert of cicadas. How can such a small insect produce sound where more than 100 decibels, and can be heard at a distance of up to 800 metres? The cicada, with an early form, lives like a humble worm under ground for seventeen years. Or that, by the time he comes out to the surface, and climb in the trees, and it turns out the wings and begins to sing, the countdown has begun. A few weeks later, he dies. Worldwide there are at least 2,500 species of cicadas, which can be divided roughly into three categories. Some 17 years living under the Earth, others 13, and some other 4. The six species of cicadas found in Greece, and it is from these living 4. Notorious, from the sound it emits, insect of the family of tetigidwn. The species are numerous, but we know here more one, the cicada plibeio him. Its length reaches up to 3 centimeters. The body is flattened, head of short and wide, has five eyes, two large, normal and three smaller, auxiliary. His wings are made of thin transparent membrane and his feet minutes and off. Its colour is generally black. We discern in him and various shades of yellow and Brown. The tzitzikas lives in the trees (pines, olive trees, maple trees, etc.). Hardly distinguished, as it is attached onto the branches. Is felt only by the sound of it. It feeds on the lymph of the shoots, which bores with a special proboscis, which resembles a plunger. The female lays eggs in holes that make up the soft shoots. This is done during July or August. From eggs coming out the larvae, approximately at the end of the summer, which descend from the trees, make holes in the Earth, near the roots and there can live four years (else 17 or 13 years) until I converted to normal nymphs. In America and the tropical countries, the number of the cicadas is huge and creates problems in crops. In Greece is totally harmless the tzitzikas. Terribly great scientific interest presents the cicada, for the special sound device in the abdominal koilotita of which created this peculiar chatter, we all hear on hot summer days. The device consists of two chambers separated by a thin membrane tensioned. Whenever this membrane vibrates, produced the sound. The audio device is located between the thorax and abdomen of tzitzikioy. The tzitzikas is deaf. This proved a mayor of Magdeburg in the last century, sparking a cannon under a plane tree in the square on which thousands of cicadas chirp, without those to quit from the deafening click. In mythology, Tithonus, a nice neanias, loved for its beauty from the Io, the goddess of the dawn. She asked Zeus to make him immortal, but forgot to ask along with immortality and her favorite non-ageing. So, when they spent the years Tithonus aged much, but dies. The gods regretted him and transformed in our known cicada.
Posted on: Tue, 09 Sep 2014 12:37:22 +0000
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