Some things about the Saint Louis Zoo are obvious. It's a popular place for people of all ages and backgrounds to visit. It's a place to see an impressive collection of over 14,000* animals in an attractive, family-friendly environment. But there's much more about the Zoo that casual visitors may never see -- activity that reaches far beyond our gates, behind the scenes and beneath the surface.

*2021 census numbers

Learning About Animals

About the Animals

Find information about animals in general and specific information on species at the Saint Louis Zoo.

Veterinary Hospital

Zoo patients get state-of-the-art treatment from our veterinarians.

Animal Food & Nutrition Center

Feeding time is an important part of the animals' day, and our Nutrition Center works hard to customize each animal's diet.

Reproductive & Behavioral Sciences

The Saint Louis Zoo participates in many science and research projects.

Enrichment & Training

Learn more about how zookeepers use these two tools to enhance an animal's environment.

Species Survival Plans

This program helps ensure the survival of a particular species.

So You Want to be a Zookeeper?

See what it takes to be a zookeeper at the Saint Louis Zoo.

Worlds of Discovery

We take pride in helping each and every visitor learn, explore and appreciate the creatures whose survival they must ensure and steward. Our animal pages will help you find specific, fun information about our animals like what makes a hippo float, how fast a cheetah can really run or which birds are pretty in pink.

A Safe Haven for Threatened and Endangered Species

When animals in the wild are threatened by loss of habitat, zoos can help provide a "safety net" and breeding ground for endangered populations. But providing shelter is just a small part of helping these species. With proper care and management, our curators, keepers, nutritionists and veterinarians make sure the animals have healthy food, adequate space, stimulating activities and the best health possible. 

A Living Laboratory

Meanwhile, our research experts conduct science and research that is used to protect and manage animals populations both in captivity and in the wild. From managing when and what animals breed to studying disease and behavior, we hope to gain an understanding of animals at the Zoo and apply this information to the conservation of the species worldwide.