Coenagrion mercuriale (Charpentier, 1840) – Mercury Bluet
NL: Mercuurwaterjuffer | UK: Southern Damselfly | DE: Helm-Azurjungfer | FR: Agrion de Mercure

Coenagrion mercuriale (Mercury Bluet or Southern Damselfly) is a western European and north-west African species. Within this range it’s scattered and mostly uncommon.

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