Libellula quadrimaculata (Linneaus, 1758)
Viervlek Four Spotted chaser   Four spotted skimmer L: 40 - 48 mm 
Relevant Dutch literature (Eng. summary)    

Viervlek man

Adult (male), Taarlo, Drenthe, June 8, 2006

Viervlek jong imago man Young adult (male), Gasteren, Drenthe, May 16, 2009
Viervlek vrouw jong

Young adult (female), De Weerribben, Overijssel, May 22, 2005

Viervlek vrouw praenubila Adult (female) form praenubila, Gasteren, Drenthe, June 4, 2007
Viervlek prenubila

Adult (female) form praenubila, Taarlo, Drenthe, June 24, 2008

Note the larger black spots on the wings than the female above.

Viervlek man oud Old adult (male), Taarlo, Drenthe, August 19, 2009
Emerging, Ijhorst, Overijssel, June 2, 2007
Viervlek uitgeslopen Emerged, Gasteren, Drenthe, May 25, 2009
Viervlek uitgeslopen

Emerged, Taarlo, Drenthe, June 8, 2006

Larvalskin Larvalskin, Gasteren, May 16, 2009

Habitat: Still waters, mostly with well developed vegetation. At acid lakes.

Distribution: Widespread in The Netherlands. Optimal habitats is acidic pools en can be exteremly abundant. Also in dunepools.

Flight season: From May to july most abundant. But also seen in September.

Status: Very common and unthreathend