The keeled skimmer (Orthetrum coerulescens) is a species of dragonfly belonging to the family Libellulidae.

[2] The keeled skimmer is common in central and southern Europe, marginally entering into Russia,[3] and in North Africa.

[4] This species is present in Afghanistan; Albania; Algeria; Armenia; Austria; Azerbaijan; Bosnia and Herzegovina; Bulgaria; Croatia; Cyprus; Czech Republic; Denmark; Finland; France; Georgia; Greece; Hungary; Iran, Islamic Republic of; Iraq; Ireland; Italy; Lebanon; Liechtenstein; Lithuania; Luxembourg; Macedonia, the former Yugoslav Republic of; Montenegro; Morocco; Netherlands; Norway; Poland; Portugal; Romania; Russian Federation; Serbia; Slovakia; Slovenia; Spain; Sweden; Switzerland; Syrian Arab Republic; Tunisia; Turkey; Ukraine; United Kingdom.

[3] The typical habitats ofOrthetrum coerulescens are pools and streams in acidic heath land, where it is sometimes seen alongside golden-ringed dragonflies.

On the contrary some (androchrome) females at the end of the reproductive cycle assume the bluish color of the male.

[4] This species resembles the black-tailed skimmer[4] but is smaller and slimmer and the male has no black tip.