Advice 1: How to identify insect

Insects belonging to the group of arthropods, the most diverse group of living creatures on Earth, which is only described over a million species. And the total number of varieties, together with those who do not yet have descriptions, according to scientists, is from 6 to 10 million. The size of the smallest insect – the Firefly Dicopomorpha echmepterygis – 0.14 mm, of the biggest the walking stick Phobaeticus serratipes – 55 see more
How to identify insect
You will need
  • - 7-times magnifying glass or binocular microscope.
To determine insect, you should know its main features. His body consists of three parts – head, thorax and abdomen. The eyes of insects are placed on the head, equipped with a pair of antennae on the underside of the Breasts are three pairs of legs. All insects are six-legged. To the upper side of the chest, often attached pair or two pairs of wings that can be covered with a hard chitinous elytra.
Carefully review the structure of the caught insect. Contact with him during the inspection very carefully, so as not to damage the legs or wings. If the first sign – the head, thorax and abdomen are present, note on the insect head, its antennae, which provide it the organs of smell and touch.
Whiskers are an important feature in determining the insect. They are: filiform, clavate, spindle-shaped, serrated, comb-like, lamellar, plumose and crankshaft. Similarly, different types of feet. Describing the insect, use the definition of its extremities: walking, jumping, digging, swimming and grasping.
For recognizing insect take advantage of the special publication – keys to insects, consisting of corresponding tables, in which the insect is classified in the totality of its external signs. Tables you can easily determine the identity of the insect to the order and family. In the tables, however, taken into account the characteristics only of large insects larger than 5 mm.
In each table describes the characteristics of the group of insects, and marked with their numbers. In parentheses indicate the numbers under which are listed opposite signs. For example, two groups: 1(6) of Wings or their rudiments no 6(1) Wings, or their rudiments are available. Start defining, examining an insect , and passing from sign to sign. If no wings, look for its description in group 1, and then proceed to group 2, if they are in a group of 6 and then to the subsequent paragraph tables.
Sequentially selecting the presence or the absence of any external sign, you will reach your ultimate goal – read the description of the insect in Latin, and next to it in Russian is written the name of the squad or family. Click on the link to the page where there is a series of colored drawings, and specify the specific name of the insect. If its shape, color and size will match the image in the Atlas, the definition of an insect can be considered complete.

Advice 2: What insects are different from arachnids

Some of the living creatures on the planet, cause people to have contradictory and ambivalent feelings. Among them include spiders and insects. Watching the behavior of these multilegged creatures, few people notice the differences between them. But insects differ significantly from members of the class Arachnida.
Spider is easily identified by the four pairs of legs

Spiders and insects: the representatives of phylum Arthropoda

The differences between small creatures with several pairs of legs, are reflected in the classification applied in Zoology. Insects belong to the same class of the phylum Arthropoda. Spiders belong to class Arachnida and the same types of insects. You should know that spiders are not just spiders but also ticks and Scorpions. But among these animals there is a significant difference in the body structure and behavior.

Today the world has more than forty thousand species of spiders. They can be found almost everywhere. Almost all spiders feed on other living organisms, such as insects. But even insects can be seen in all corners of the Earth. A number of them types, past the classification and described in science, is about one million.
The science that studies insects is called entomology. Arachnid is devoted to a different branch of scientific knowledge – arachnology.

Of course, both arthropods differ from one another by the structure of the internal organs. But the device of these little organisms are quite complex, so a person who is not a specialist in the field of biology, it will be difficult to understand the fundamental differences between a spider and, for example, ant. Therefore, it is safer to determine with whom you met on the forest path, the characteristic external signs.

Unlike spiders from insects

The body of any insect has three main divisions: head, thorax, and abdomen. The eyes of members of this class may be different: simple or compound. Mouthparts also comes in several forms: stabbing, gnawing or licking. One of the main characteristics of insects – three pairs of jointed legs that connect to chest. But that's not all: some insects have additional useful elements of the body – wings.

But the body of the spiders can only consist of a couple of sections of the abdomen and cephalothorax, connected by a very thin bridge. The cephalothorax is possible to notice a slight furrow, which conditionally divides this part of the body on the head and breast. The oral apparatus is located at a spider directly on the icon.
To be certain not to make a mistake, you need to count the number of legs you are interested in small animal. The spider, unlike the insect has not three, but four pairs of jointed legs.

Insects are almost omnivorous and are not particularly picky about food. They are happy to eat parts of plants, although I am not above the corpses of their relatives. Spiders are notorious predators. Certainly, many people were able to observe how well the spider weaves its lovchie networks and how patiently waiting for the next hapless victim. And often the prey of the lurking spider be harmless insects. In the fight for the right to exist, the spider usually wins.
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