1. Henry Doorly Zoo and Aquarium, Nebraska (962 Species) Omaha's Henry Doorly Zoo features the largest collection of animals in the country by far, with 962 species listed as living here across ...

Spanning 100 acres in Balboa Park, the San Diego Zoo is not only one of the largest zoos in the country, it's also home to one of the largest collections of rare and endangered animals in the ...

zoo officials said Thursday. Perentie lizards, or Varanus giganteus, are native to Australia and one of the world's largest lizards, dwarfed only by the Komodo dragon and a few others.