On July 6, 1923, by initiative of the misionary and pioneer of Mexican Biology, Alfonso L. Herrera, the first stone of the Chapultepec Zoo was placed. The zoo receives more than 5,5 million visitors a year and is home to more than 2050 animals of 250 different species. Their objectives are those to foment education activities and investigation to cause that the animals of the collections stay healthy and reproduce, and with it its conservation is obtained, offering to the visitors recreation, relaxation and a culture of protection to Zoological silvestres. The fauna and the flora has become a modern resource to protect the biodiversity, and has stopped being only recreational centers, is in fact, the only possibility of survival of some species, as well as authentic genetical banks.