Dragonfly insect<<<< Back to insects
- Kingdom: Animalia
- Phylum: Arthropoda
- Class: Insecta
- Order: Odonata
- Family: Anisoptera
- Conservation status: Least concern
- Areal: Worldwide
- Habitat: Wetlands and close to water
- Diet: Carnivore (Mosquitoes)
- Size: 2.4-10cm (1-4in)
- Colors: Yellow, Black, Orange, Red, White. Brown, Blue
- Length: 2 mm (0.08 in) - 35 cm (14 in)
- Prey: Mosquitoes, Fly, Bee
- Predators: Small Birds, Fish, Lizards
- Lifespan: 7 months
- Reproduction: about 60 Eggs
- Special Features: Long body shape and large, transparent wings
Dragonfly can be found in Europe (except Scandinavia), Central Asia, the Mediterranean region, the Caucasus, North India, North Africa and Central. Perhaps in Moldova species is prevalent throughout.
They are true experts in the art of flight and they can catch prey in the air. They have two pairs of wings, which acts separately. When to fly more slowly, first pair of wings beat before the second. To fly faster, two pairs beat in unison.
Their wings allow them to be classified into two subgroups: Dragonflies Anisoptera subgroup belong unequal wings - their rear wings have a wider basis.
Dragonflies with equal wings belong to the subgroup Zigoptera - two pairs of wings have the same shape. They are smaller and fly slower and more elegant than dragonflies with wings uneven.
Dragonflies live near water - rivers, lakes, ponds. After copulation, the female lays its eggs here.
They feed on insects, even from their own species.
Until now it was believed that male dragonflies shows an elaborate courtship behavior, attracting females, especially maneuvers flown at high speed. A latest study conducted using sophisticated cameras, show that males heats literally flying towards the sun. All in order to impress females.
This type of sexual behavior, unsuspected for some species of insects, is the best evidence dragonfly female on male qualities, providing them with information referitare territories ruled by male suitors.
Energy captured bodies Japanese male dragonfly (Mnais costais) in flight times in full battle sunlight, ensure that they maintain high body temperature for longer periods of time, allowing them to woo more women available.
The team that investigated the behavior of dragonflies suite, also found that males the "tan" were most likely to guard their insatiable appetites of male female rivals.
Dragonfly imperial abdomen length - 49-61 mm wingspan - 90-100 mm. The thorax is a bright green color. The abdomen is elongated male color is cyan, the black tape with a zigzag form at the back and in the female - brown green tape. Anterior and posterior wings differ both in form and as nervatiune; at rest they are stretched perpendicular to the body.
Male dragonflies are known for their territorial behavior. Male patrolling an area waiting for the passage of females and males will hunt intruders occurring in the area. Will transfer sperm from male genital organ or, at the end of the abdomen, a special receptacle located on the second abdominal segment, near the chest.
When a female will enter the territory, he will follow and will grab the neck with his organs under special tail end. When the female will get in contact with the end of her abdomen male receptacle to receive sperm. The pair may remain in this related time and can even fly in this position.
Most dragonflies simply let fall their eggs on the surface, it attaches to the stems of aquatic plants or submit them in the mud. Damselfly dragonflies dragonfly dragonflies and some lay their eggs in a slot that make the plant stem surface or submerged.
Eggs develop into nymphs who spend their whole lives entirely underwater feeding on aquatic animals. Some dragonfly nymphs waiting motionless and attack passing prey with incredible speed and accuracy. Nymph lives from six months to five years, depending on water temperature and amount of food.
It sheds ten or more times. Both Dragonfly pass through incomplete metamorphosis during their development. Damselfly nymphs are generally elongated, thinner than the dragonfly nymphs.
Nymph emerges from the water just before the last moult, becoming adult winged. The adult lives in one to two months in temperate regions and the tropics up to one year.
Did you know that:
The eye of the dragonfly is made up of more than 30 thousand simple eye
Orient these dragonflies and their larvae are eaten by humans.
An adult dragonfly lives only 1-2 weeks.
Dragonfly has the largest wingspan is 70-80 cm.