Mexico City’s environment secretary, Julia Álvarez Icaza, said on 15 July that Xin Xin—the 35-year-old giant panda at Chapultepec Zoo—has entered the final stage of her life cycle. Giant pandas typically live 20 to 25 years in human care, making Xin Xin the world’s longest-lived specimen under managed conditions. Álvarez Icaza told reporters that zoo staff are preparing for Xin Xin’s imminent death and plan a public homage at the panda enclosure. The announcement has reopened debate over the future of pandas in Mexico, because China now retains ownership of all pandas born after 1984 and leases the animals to foreign zoos. Mayor Clara Brugada said the city will review its conservation strategy before deciding whether to seek a new panda pair. Securing the animals would require a 10-year agreement and an estimated US$1 million in annual lease payments to the Chinese government, in addition to meeting strict breeding and habitat conditions.