Bialowieza village,
Poland 52º
42' 03.0'' N 23º 50' 08.2'' E28
June 2009, 2120h
Advertising/territorial song of male in rank, damp vegetation
in a large forest clearing; classic rasping double-notes produced
c105 times/min (in c52 double rasps) - note the 'broadband' frequencies between 1 and 7
kHz.