The Dragonfly can be found in Europe (except Scandinavia), Middle Asia, the Mediterranean region, Caucasus, North India, North Africa and Central Africa. Probably in the Republic of Moldova the species is spread throughout the territory.
They are real experts in the art of flying and can catch their prey in the air. They have two pairs of wings that act separately. When it has to fly more slowly, the first pair of wings beats ahead of the second. To fly faster, the two pairs knock in unison.
Their wings allow them to be classified into two subgroups: The uneven wings of the Anisoptera subgroup – their wings on the back have a wider base.
Equal winged leaflets belong to the Zigoptera subgroup – they have two pairs of wings of the same shape. They are smaller and fly slower and more elegant than uneven wings.
The Dragonfly live near water – rivers, lakes, ponds. After copulation, the female puts eggs here.
They feed on flying insects, even from their own species.
To date, it has been thought that the dragon-fly males have an elaborate curse behavior, attracting females, especially with high-speed maneuvers. A recent study, conducted with the help of sophisticated video cameras, shows that males are actually getting hotter on the sun. Everything to impress the females.
This type of sexual behavior, unsuspected for some species of insects, is the best clue to male calves for dragon-fly females, providing them with reference to the territories owned by male candidates.
The energy captured by Mnais costais males during flight times in full beating of the sun rays ensures that they maintain high body temperature over a longer period of time, allowing them to cure as many females as possible.
The team of researchers who investigated the dragon-fly behavior of babies also found that the “tanned” males had the best chance of guarding their females from the unsavory appetites of their rival males.
Imperial Dragonfly: Length of the abdomen – 49-61 mm, wingspan – 90-100 mm. The thorax is of a bright green color. The abdomen is elongated in males in azure color, with a black zigzag strip at the back, and in females – green with a brown band. The anterior and posterior wings differ both in shape and nerve; in rest they are stretched, perpendicular to the body.
Dragonfly male are known for their territorial behavior. The male patrols an area awaiting the passing of a female and will hunt the intruders who appear in the area. The male will transfer sperm from its genital organ at the end of the abdomen to a special receptacle on the second abdominal segment near the chest.
When a female will enter her territory, she will follow him and inhale with her special organs at the end of her tail. Then the female will bring the end of her abdomen into contact with the male receptacle to receive the sperm. The pair may stay in this position for a while and may even fly in that position.
Most dragonflies simply let eggs fall on the surface of the water, attach them to the stems of the aquatic plants or lay them in the mud. Damselfly and some Dragonfly Dragons lay their eggs in a slit they make in the plant stem at the surface or below the water level.
Eggs turn into nymphs that spend their whole life under water, feeding on aquatic animals. Some dragon-fly nymphs are waiting for motionless and attacking prey in passing with incredible speed and precision. Nimfa lives from six months to five years, depending on the water temperature and the amount of food.
She fed ten or more times. Both types of dragonfly go through an incomplete metamorphosis during their development. Nymphs of damselfly are generally elongated, thinner than dragonfly nymphs.
Nimfa comes out of the water just before the last shot and becomes a winged adult. The adult lives from one to two months in temperate regions and up to one year in the tropics.