Taxon: Cordulegaster boltonii
2016-06-14 Lower Austria, district Wien-Umgebung, Wienerwald (350 msm Quadrant 7862/2)
German name: Zweigestreifte Quelljungfer
ID source: Wikipedia
Habitat: spruce forest on acidic sandstone (natural vegetation would be beech forest), near a tiny stream
Occurrence: not very common
on Asparagus officinalis
Sitting on Carduus acanthoides, Eryngium campestre (larval host plants) nearby.