Common Darter Sympetrum striolatum
Breeding populations only known from Åland and island of Örö. The species is not uncommon there, and is possibly underrecorded in southwestern archipelago. Identification difficulties (see. Moustached Darter Sympetrum vulgatum must be considered at all times. The species is quite common in Åland.
Åland population is very dark and is often treated as nigrescens-taxon, vernacular name in english being Highland Darter. The taxonomic situation of the two taxons is, as of yet, unresolved.
Flight period: late July - October.
Female from Åland. This population is quite dark, and some females even resemble Black Darters. Janne Koskinen