English name:  Black-tailed Skimmer

Like all members of the family Libellulidae, the male Black-tailed Skimmer also tends to stand in a conspicuous place for long hours, usually at the same lookout point to which it will return even if disturbed. While standing like this it waits for a female to pass through its territory.
 Members of the genus Orthetrum tend to perch on 4 legs, with the pair of front legs folded behind the head.

Size:  Medium (4-5 cm).

Habitat: Large lakes and ponds with exposed shores.
Prefers to rest on the ground

Distribution: In most parts of Europe through the Middle East to China.
In Israel it was first discovered in June 2018 in the Golan Heights. Since then the population has spread throughout the Golan Heights, especially in the north and up to Mount Hermon.

Season: Beginning of May-end of September (according to data from Turkey)

Identification marks:

MaleThe male's light blue coloration comes from a bluish powder that covers its body in adulthood.
The male's abdomen is covered with a bluish powder and only segments eight to ten are black. The sides of the abdomen are spotted with yellow dots. The thorax is dark brown.

The eyes are green. 
The pterostigma is black. (diagnostic mark among skimmers)

The young resemble the females.

Female - Yellow.
The sides of the thorax are striped with black.
A thick black stripe runs לאורך the sides of the abdomen.

Similar species:
Male - almost all members of the genus Orthetrum are very similar to one another.

Female - almost all females of the family Libellulidae are very similar and attention must be paid to details to distinguish between them.

* The species name "Black-tailed" is only a proposed name and has not been approved by the Academy of the Hebrew Language.

Black-tailed Skimmer Orthetrum Cancellatum - Male © אלדד גולן
You can see the dark thorax, the blue abdomen with the black tip and yellow spotting. Also the black pterostigma.

Black-tailed Skimmer Orthetrum Cancellatum - Female © עבאי רקורדס
You can see the female's abdominal pattern, which includes two stripes לאורך the abdomen and the black pterostigma.