Chorus_vs_Solo Chirp period

The Chirp period (CP) of males either attending a small chorus consisting of four males and the average chirp period of the same males singing in isolation.雄性个体的鸣唱周期（Chirp Period，CP），既可指其参与由四只雄性组成的小型鸣唱群时的鸣唱周期，也可指该组雄性个体单独鸣唱时的平均鸣唱周期。