Monday, August 1, 2011

Insects in the early winter

Well, the insects? Wintering adult insects and larvae lurk with the onset of cold weather in various secluded places: crawl under a lagging bark of stumps and fallen trees, in cracks and fissures of the cortex, are hidden under the moss and fallen leaves, burrow into the soil. Here they spend the winter, tsepeneya and looking "dead" in a strong cold, warming and delayas moving to thaw. Many insects overwinter in the egg stage, or pupa. Pupae are usually located in a sheltered place, before pupation the larva (or caterpillar), if she had lived openly, for the most part, or buries itself in the soil, or crawls under the tree bark, in hollow, etc. Only occasionally larvae pupate openly, are, for example Caterpillars Butterflies cabbage. Open and the eggs overwinter some butterflies, deferred to the bark of branches or trunks. Relatively few species overwinter as adults. It was found that of European butterflies only 1,5% of winters in the cruise stage, 3% in the form of eggs, 25% in the form of pupae and 70% in the form of larvae. Hence, the majority of butterfly caterpillars is best suited to winter. Organize a walk in the forest during a thaw. Here you can see many interesting things. On such days in the snow near the trees and stumps can sometimes see small velvety black larvae of a small beetle of the family myagkotelok. This so-called "snow worms". They spend the winter under tree roots or stones. When the melt water begins to fill up their shelter, they crawl out, The adult beetle myagkotslka-distant relative of the firefly. In summer it is beneficial that eats smaller insects, among which there are many pests. Sam beetle dies before winter, and his black-velvet larvae overwinter.

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