Science & Tech · Science & Environment · 3 hrs ago
62 Endangered San Francisco Garter Snakes Released in California
Conservationists released 62 young San Francisco garter snakes at sites in San Mateo County, California, earlier this fall.
The snakes were born at the San Francisco Zoo and are the first of their species to be released into the wild after being raised in captivity.
The species is found only in San Mateo and Santa Cruz counties and has been endangered since 1967.
Only a few thousand are thought to remain in the wild, facing threats including drought, disease, invasive species, poaching and low genetic diversity.
The project used head-starting, a method that raises young animals in captivity through a vulnerable stage before releasing them.
Genetic testing helped conservationists choose release sites, including places where more genetic diversity could support breeding.
More than 130 additional snakes were born at the zoo this year, and conservationists hope to release them in 2027 while monitoring the first group.
Conservationists released 62 young San Francisco garter snakes into the wild in San Mateo County earlier this fall.
The snakes were born at the San Francisco Zoo as part of a captive-rearing effort to support the endangered species.
Researchers used genetic testing to help choose release sites, including locations in need of greater genetic diversity.
The species is native only to California’s San Mateo and Santa Cruz counties, and researchers estimate a few thousand remain in the wild.
More than 130 San Francisco garter snakes were born at the zoo this year, with a further release planned for 2027.
- Who
- Conservationists released 62 young San Francisco garter snakes born at the San Francisco Zoo.
- What
- The snakes were released into the wild for the first time as part of a conservation effort.
- When
- Earlier this fall. The article was published on November 12, 2026.
- Where
- Sites across San Mateo County, California.
- Why
- To support the recovery of the endangered species and build healthy, genetically diverse populations.
This story does not have two clearly opposing sides.
Conservationists began head-starting the first batch by collecting pregnant females from a healthy preserve in California’s Midpeninsula.
Researchers returned the adult snakes to their habitats and kept the infants at the San Francisco Zoo.
Conservationists released 62 zoo-born young snakes at sites across San Mateo County.
Conservationists plan to release another generation of snakes born at the zoo.
- Snakes released
- 62
- Release location
- Sites across San Mateo County, California
- Species range
- San Mateo and Santa Cruz counties, California
- Zoo births this year
- More than 130
- Planned next release
- 2027
What people are saying
Seeing these young snakes returning to the wild represents years of research, collaboration, habitat restoration and careful conservation work.
This first release is an important step toward building healthy, resilient populations that can sustain themselves over the long term.
The success of this project and the associated research will not only benefit the San Francisco garter snake but will also hopefully inform the recovery of many imperiled reptile species.