Arctic Bluet

The Nordic damselfly ( Coenagrion johan jacksoni) is a species of dragonfly in the family Coenagrionidae ( Coenagrionidae ).

Features

The dragonflies reach a body length of 27 to 30 millimeters. The fourth and the fifth abdominal segment of the male are completely black in color. All other abdominal segments of the male are colored blue and have a drawing from the side it looks like a M. When viewed from above from the abdominal segments of the male are striped black and blue. The style has many similarities with the Azure Damselfly. The female is also colored blue, the differences of the female are that there are three lines that spread all abdominal segments has.

Occurrence

The dragonflies are found in Northern Europe. They are mainly found in ponds and other waters and on the dunes.

Way of life

In some areas, hundreds of these dragonflies can appear, for example, on the coasts or in the swamp. Like many other dragonflies also eat these insects, which it catches in flight. During mating, the male grabs the female, as in the horseshoe Azurjungfern, with their abdomen pincers ( cerci ) below the head. For fertilization, the dragonflies make the Paarungsrad. Before mating, the male fills by a curvature of the abdomen the front, located on the third abdominal segment seminal vesicle with sperm. Then the eggs are fertilized. Spawning also takes place in pairs in tandem. The eggs are usually laid in shrubs from the air. It takes about 3-5 weeks until the larvae hatched.

Larval development

The larva lives in streams, as well as in ponds. It takes about a year, until the larva to the insect is finished.