The National Zoological Park (originally Delhi Zoo) is a 176-acre (71 ha) zoo near the Old Fort in Delhi, India. A 16th-century citadel, a sprawling green island and a motley collection of animals and birds, all in the middle of a burgeoning urban Delhi. The zoo is home to about 1350 animals representing almost 130 species of animals and birds from around the world. The zoo can be seen on foot or using a battery-operated vehicle which can be rented at the zoo.[4] Visitors are not permitted to bring any food other than drinking water, but there is a canteen in the zoo.[5] In 2014 a visitor was killed as he had fallen into the white tigers enclosure,[6] leading to questions about visitor and animal safety at the zoo.

The Delhi zoo came decades later after New Delhi was built. although the idea to have a zoo at the national capital was mooted in 1951, the park was inaugurated in November 1959.[8]

In 1952 the Indian Board for Wildlife created a committee to look into creating a zoo for Delhi. The government of India was to develop the zoo and then turn it over to Delhi as a working enterprise. In 1953 the committee approved the location of the zoo, and in October 1955 it assigned N. D. Bachkheti of the Indian Forest Service to oversee the creation of the zoo.[2]

Initially Major Aubrey Weinman of the Ceylon Zoological Garden (now the National Zoological Gardens of Sri Lanka) was asked to help draw the plans for the zoo, but because he was not available for the long term, Carl Hagenbeck of the Zoological Garden of Hamburg was hired. In March 1956, Hagenbeck presented a preliminary plan, which included the recommendation to use moated enclosures for the new zoo. The plan was modified as needed to account for local conditions, and approved by the Indian government in December 1956.[2]

By the end of 1959, the Northern part of the zoo was complete, and animals which had been arriving for some time and which had been housed in temporary pens were moved into their permanent homes. The park was opened on 1 November 1959 as the Delhi Zoo. In 1982 it was officially renamed to National Zoological Park, with hopes that it could become a model for other zoos in the country.