Ilmatsalu,
Estonia58°
23' 40.6" N 26° 32' 32.4" E25
May 2010, 1905h
Territorial song from male
close to the nest in lake-side birch; female present,
later responding with shorter, less down-slurred, high-pitched
notes (note: the Great Reed Warbler has been edited
out of the sonogram).