The park spreads over an area of 67.57 acres. Of which approximately 10 acres of this land is under display, the rest is zoo forests and old Conservation Breeding Centre.

   The zoo has been a pioneer for conservation breeding of endangered Eastern Himalayan Species in India.

   The first ex-situ conservation breeding program started in 1986 as a Snow Leopard conservation breeding project.

   The Red Panda project was started in the year 1990.

   In 2003-04 the park released 4 female Red Pandas into the Singalila National Park. This was the first reintroduction programme for the species in the world and was immensely successful.

   The park is divided into 3 sections- the lesser carnivore section, the herbivore section and the carnivore section.

   The lesser carnivores section includes 7 species, herbivore section includes 7 species, carnivores 5 species and omnivore 1 species of animals.

   Darjeeling Zoo houses 9 numbers of Pheasant species including 6 indigenous pheasant and 4 exotic pheasant.

   The park also houses 1 species of amphibian and 3 species of reptile.

   The park also includes 3 conservation breeding centers, Old Conservation Breeding Center, Conservation Breeding Center at Topkeydara, Satellite Zoo at Dowhill.

   The zoo is a part of World Association of Zoos and Aquarium (WAZA) and Zoological Information Management System (ZIMS) since 2009.

   The zoo was awarded the “Royal Bank of Scotland Earth Hero Award” as recognition for its efforts towards in-situ and ex-situ conservation, in 2014.

   In the year 2022, the Central Zoo Authority of India (CZA) ranked PNHZ Park First in all categories among all zoos in the country.