歌唱声
3.Wetlands, woodlands and meadows are erupting into songs as the returning birds stake out their territories and begin mating rituals.
5.Characteristics of calls of Carpodacus erythrinus grebnitskii , including song, alarm call and contact call were studied with computer analysis. The results show that the song of birds relates to their behavior.
9.It incorporated acoustic-guitar playing, singing, chanting, dancing, and staccato hand-clapping.

