Functional diversification of contact calls contribute to the cohesion of a multi-level society. - Yang, Yi-Jun; Yan, Ying; Fang, Gu; Song, Yu-Ting; Zang, Jing; Tian, Wen-Yong; Zhu, Dai-Bo; Garber, Paul A.; Li, Bao-Guo; Qi, Xiao-Guang (Behavioral Ecology & Sociobiology, 2024)