Geographical variation in squirrel mating calls and their recognition limits in the widely distributed species complex. - Tamura, Noriko; Boonkhaw, Phadet; Prayoon, Umphornpimon; Phan, Quoc Toan; Yu, Pei; Liu, Xingyue; Hayashi, Fumio (Behavioral Ecology & Sociobiology, 2021)