Moustached Warbler, Acrocephalus melanopogon, is a species of passerine bird in the warbler family found in wetland and river and lake ecosystems. It is a widespread but patchily distributed breeder in southern and eastern Europe (Bird in Europe 2004). This species occupies low aquatic vegetation, especially reedbeds, but also rush stands, sedges, reedmace ( Typha ) and others, often with admixture of bushes or tamarisks ( Tamarix ). Its optimal habitat appears to be old reedbeds containing a high proportion of dead material and a complex lower stratum, with tall reeds above. In addition it is found along lake margins, ditches, beside freshwater and brackish marshes, and in very small reed marshes in steppe zone (European Red List 2015).

Acrocephalus melanopogon has a breeding population size of 14900-30200 pairs and a breeding range size of 54400 square kilometres in the EU27. The breeding population trend in the EU27 is Unknown in the short term and Unknown in the long term.

The EU population status for Acrocephalus melanopogon is Unknown, as the data reported were not sufficient to assess the population status of the species.