SF Zoo by the Numbers

San Francisco Zoo & Gardens is home to a broad range of endangered, exotic and rescued animal species. Over the past few years, SF Zoo has undergone a philosophical transformation, as we tell the story of the importance of ecological biodiversity, and how human behavior has threatened many once thriving regions around the world. As such, while our focus has always been wildlife conservation as the cornerstone of our mission, our emphasis now is to create a space and dialogue for guests to better understand why so many of the world’s species are endangered, with many species in danger of becoming extinct.

 We feel it is important to share the breakdown of our animal residents, to underscore how important it is to learn about, learn from and contribute to our knowledge base, about species whose numbers have dwindled or continue to decline, due to climate change, deforestation, illegal poaching, human encroachment and loss of habitat and genetic variation.


SF  Zoo Animal Species 

This list is comprised of the total animals housed here and animals that are part of our conservation program.

  • Mammals –  164 individuals/59 species
  • Birds – 230 individuals/53 species
  • Reptiles – 88 individuals/45 species
  • Amphibians- 2133 individuals/16 species
  • Invertebrates- 3367 individuals/34 species

Total number= 5982 individuals/207 species

SF Zoo Endangered Species 

The International Union for Conservation Nature (IUCN) which publishes the IUCN Red List of Threatened Species was established in 1964. According to the IUCN, their Red List is the world’s most comprehensive source on global extinction risk status of animal, fungus and plant species and is a critical indicator of the health of the world’s biodiversity. SF Zoo’s listed species are as follows:

  • Critically Endangered – 14 species
  • Endangered Species – 18 species
  • Vulnerable Species – 21 species

The approximately 199 different species here are comprised of 41 species that are on the IUCN Red List. 21% of the species we care for are in danger of disappearing without human intervention.

(Note: some species are not listed due to insufficient data, in particular, the Insect Zoo)


Rescued Animal Census

 SF Zoo plays an important role in the community, statewide and under federal guidance, as a resource to provide permanent housing for various orphaned, non-releasable, former pets, confiscated animals, or animals placed here by federal wildlife authorities. These individual animals serve as important ambassadors of their species, and would otherwise not survive.

Individual animals are noted here by percentage:

  • Mammals – 25/147 – 17%
  • Birds – 12/225 – 5%
  • Reptiles – 41/72 – 57%
  • Amphibians – 9/26 – 35%
  • Insects are not included

Approximately 20% of exhibited animals are from the rescue process.


Re-establishing Locally Threatened Populations

 In an ecological region, species of all sizes and scope, from insects to amphibians and reptiles, to birds and mammals, play an important part in their environment. As such, our Conservation Department works to re-establish populations in areas where some species disappeared, and working in tandem with state and federal agencies and partner organizations. Our team here raises species for re-release, while our partners monitor their recovery in the area.

  • Sierra Nevada yellow-legged frog (Rana sierrae)
  • California red-legged frog (Rana draytonii)
  • Western pond turtle (Actinemys marmorata)
  • Yosemite toad (Anaxyrus canorus)
  • San Francisco garter snake (Thamnophis sirtalis tetrataenia)
  • San Francisco forktail damselfly (Ischnura gemina)

Reintroductions of these species are occurring at the Yosemite National Park, Golden Gate National Recreation Area, Sequoia-Kings National Park, and Plumas National Forest