Dragonflies, the oldest flying insects. Today, scientists know more than 6650 species, which differ in size and color. Some dragonflies live in the capital — told the experts Mospeada.
Dragonflies live near water: lakes, ponds, swamps and rivers with low flow. They also live in places where a lot of insects, on meadows, wood glades. In the territory prirodno-historical Park “Moskvoretsky” is inhabited by two families of dragonflies: arrow keys and rocker.
Arrows — a small and graceful dragonfly with a blue abdomen with a miniature belonging to the suborder Homoptera. Rocker much more insects reach a length of 73 mm. They belong to the suborder changewing. In repose its wings are perpendicular to the axis of the body. During the flight, the rocker arm can swing each pair of wings separately, which have ample opportunity for maneuvering.
rocker brown thorax and abdomen, transparent and unpainted wings, green eyes, and on the second abdominal segment has a characteristic yellow triangular spot. Also there are yellow spots at the base of each of the rear wings.
the extremities of dragonflies long, composed of five main parts. The femur and tibia are covered with spines in two rows. Front legs of a dragonfly are used to hold prey, and the rest for takeoff and landing.
the Rocker arms are active predators, with both adults and larvae. The adults attack the gadflies and mosquitoes land, and the larvae eat their eggs in the water. By the way, the larvae are very sensitive to water pollution. It is therefore important to maintain clean water bodies.
to See the rocker in the period from July to September. They are active in the daytime, though can awake and at night I love warm and Sunny days. Spend the night in the treetops.
Dragonflies are good fliers and can develop a high speed corresponding to vehicle speed to 60 kilometers per hour. In addition, these insects can some time to hang in the air, looking for prey.
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