The Madrid Zoo Aquarium is a 20-hectare (49-acre) zoo and aquarium located in the Casa de Campo in Madrid, Spain. The Zoo is owned by the city, but is managed by the international entertainment operator Parques Reunidos. Opened in 1770, it is one of the largest zoos in Spain and one of the few zoos in the world that houses Giant Pandas.
The zoo was opened in 1770 as the "Casa de Fieras" in Retiro Park, to exhibit animals from the American colonies, on grounds which are part of the Parque del Buen Retiro. The new facilities of the MadridZoo Aquarium were constructed in 1972 and located in the Casa de Campo.
In 1978 China presented the King of Spain with two giant pandas, Shao Shao and Quian Quiang. Their cub, Chu-lin, born in 1982, died in 1996. Chu-lin was the first panda born in captivity using artificial insemination in Europe
The zoo is now home to giant pandas Bing Xing (M) and Hua Zui Ba (F), who arrived in Madrid on 8 September 2007. Twin cubs, Po and De De, were born to them on 7 September 2010. They were conceived via artificial insemination.