50 Years of Giant Panda Conservation Success

The Smithsonian's National Zoo and Conservation Biology Institute has spent 50 years advancing giant panda conservation through increasingly sophisticated breeding efforts that rely on scientists, researchers, veterinarians, and animal care specialists. Early experience showed that breeding giant pandas is far more complex than simply pairing two animals, requiring semen collection, successful freezing and defrosting of samples, recognition of estrus behaviors, and safe artificial insemination. Ling-Ling and Hsing-Hsing, the first two giant pandas at the Zoo, arrived in 1972 as gifts to the American people after President Nixon's visit to China; they bred and Ling-Ling gave birth to five cubs, but none survived. Ling-Ling died in 1992 as the longest-lived panda in human care outside China, and Hsing-Hsing later surpassed her record by living to age 28. Mei Xiang and Tian Tian arrived in 2000 and first attempted to mate in 2003 without success, followed by several years of artificial insemination efforts. In 2005, Mei Xiang gave birth to the Zoo's first surviving panda cub, Tai Shan, who later went to China in 2010 for breeding research and now lives at the Wolong Giant Panda Reserve in Sichuan, where he has fathered a cub born in 2020. After Tai Shan matured, Mei Xiang experienced several pseudopregnancies and in 2012 gave birth to a cub that did not survive. Scientists artificially inseminated her again in 2013, when she gave birth to a stillborn cub and to Bao Bao, who later went to China in 2017 and now lives at the Wolong Giant Panda Reserve in Sichuan Province alongside Tai Shan; she became the mother of a female cub in 2020 and twin males in 2021. In the summer of 2015, another artificial insemination led Mei Xiang to give birth to two male cubs; the smaller died, but the larger survived and was named Bei Bei by the First Lady of the United States and the First Lady of the People's Republic of China. He went to China in 2019 and now lives at the BifengXia Base in Ya'an. In 2020, scientists again used frozen-thawed semen from Tian Tian to artificially inseminate Mei Xiang, and after veterinarians later saw fetal tissue on an ultrasound, she gave birth that summer to Xiao Qi Ji. Across five decades, healthy cubs born through this work have gone to China to help strengthen the giant panda population, and each advance in breeding and biology has supported the future of the species.

Washington, District of Columbia · United States