Hi folks,
Can any of you please provide me with a specific reference citation that
investigates or reports on whether our nocturnal birds, particularly the
Southern Boobook, the Tawny Frogmouth and the Australian
Owlet-nightjar, have seasonal changes in their calling behaviour (as in
frequency of vocalisation of their most characteristic calls, not the type of
sound made). Preferably based on south-east Australia. I don't doubt that they
do but I want to do better than guess. It is for my report on the first 18 years
of COG's GBS.
I don't wish to start a debate so please reply privately, thanks.
Philip
