The Cincinnati Zoo and Botanical Garden, is the second-oldest zoo in the United States and is located in Cincinnati, Ohio. It opened in 1875, just 14 months after the Philadelphia Zoo on July 1, 1874. The Reptile House is the oldest zoo building in America, dating from 1875. The Cincinnati Zoo is located in the Cincinnati neighborhood of Avondale. It was founded on 65 acres (26 ha) in the middle of the city, and since then it has acquired some of the surrounding blocks and several reserves in Cincinnati's outer suburbs. The zoo conducts breeding programs, the zoo was the first to have successfully bred California Sea Lions, the zoo also has breeding programs for cheetahs, Sumatran rhinoceros, Malayan tigers, and Western Lowland Gorilla, Pottos, Masai giraffe and many more. Three Bonobos were born at the zoo last year, two in March and one in May, along with another birth in December 2003. The Cincinnati Zoo was the home of Martha, the last living passenger pigeon, which died there in 1914. It also was home to the last living Carolina parakeet in 1918. Rated by peer zoological parks as one of the best zoos in the nation, the Cincinnati Zoo continues to set the standard for conservation, education and preservation of wild animals and wild spaces. Over 1.2 million people visit the Zoo annually. The Zoo features more than 500 animal and 3,000 plant species, making it one of the largest Zoo collections in the country.