Combination of facial and nose features of Amur tigers to determine age. - ZHAO, Caiping; DAI, Wenrui; LIU, Qiang; LIU, Dongqi; ROBERTS, Nathan James; LIU, Zhaoli; GONG, Ming; QIU, Hongkun; LIU, Changhai; LIU, Dan; MA, Guangkai; JIANG, Guangshun (Integrative Zoology, 2025)