The Black-tailed Skimmer, Orthetrum cancellatum, is a European and Asian dragonfly.
It occurs nearly all over Europe except northern UK and Scandinavia, to the east the range extends to Kashmir and Mongolia.
The adult male has a blue abdomen with a black tip and transparent wings, and the female has a yellow (later: brown) body with black bands along the abdomen and transparent wings.
Even the immature males look that way.
This species has expanded its range, assisted by the creation of gravel pits which give it the extensive open unvegetated areas it prefers.
It was first recorded in Great Britain in Essex in 1934.
Info from wiki
This guy is an adult male, seen in Hungary, June 2006.
|From Hungary Nature|
Somogy, Hungary – June 2006
Copyright by NicoleB Photography