Balkan Warbler Phylloscopus orientalis used to be very rare (almost accidental) sightings near Athens in the past. In the last two years, however, they have been seen in several different sites (Tritsis Park, Vravrona Wetland, Mt Hymmetus) in both migration periods. This increase is almost certainly caused by the increase of birdwatchers and not by an increase of the population. Its rarely heard sparrow-like chirping call was most probably overlooked in the past.
