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Inaugural Presidio Nature Challenge BioBlitz Joins Global Efforts, Spotlights Biodiversity in the Presidio, April 28

Inaugural Presidio Nature Challenge BioBlitz Joins

Global Efforts, Spotlights Biodiversity in the Presidio, April 28


​​​​​San Francisco (March 15, 2018)—The Presidio Trust invites people of all ages to participate in the inaugural Presidio Nature Challenge BioBlitz, on Saturday, April 28. The event is part of the third annual City Nature Challenge, a competition between cities worldwide measuring which city can observe and record the most species of plants and animals. Founded in 2016 by the California Academy of Science and the Natural History Museum of Los Angeles, the challenge uses friendly city rivalries to engage citizens in science and deepen understanding of local biodiversity. At the Presidio, Trust ecologists will guide visitors toward discovering plant and animal species in the park, and cataloguing and sharing their findings using the iNaturalist app developed by California Academy of Sciences. In total this April, over 60 cities will compete worldwide. Results will be announced May 4.

The Presidio Nature Challenge not only inspires visitors to be stewards of San Francisco’s 1,491 acre urban National Park, it also helps the Presidio Trust in its commitment to increase the variety of living organisms within its boundaries. Increased biodiversity boosts ecosystem productivity, and strengthens the bonds between species to create a balanced ecosystem, which scientists believe is healthy for the planet. “The Presidio couldn’t be a better place in which to hold a BioBlitz,” says Associate Director of Natural Resources Lew Stringer. “As an organization, the Presidio Trust is a model of environmental stewardship within an urban environment. This event not only encourages the public to explore nature in the Presidio, but it helps us collect valuable data on the current biodiversity of the park so we can grow it for the future.”

Presidio Biodiversity

The Presidio’s long tenure as a military post (1776-1994) ensured that its natural setting was significantly protected from urbanization as the city around it grew increasingly dense. But when the Army left, many of the Presidio’s natural resources were in a state of decline. Since taking over management of the Presidio in 1998, the Presidio Trust has worked with its partners at the National Park Service (NPS) and the Golden Gate National Parks Conservancy to restore and preserve the park’s natural landscapes. The diversity of wildlife in the Presidio is unusually high for an urban park, with 323 species of birds, mammals, reptiles, amphibians, insects, and fish; its location on the Pacific Flyway attracts more than 65 bird species during their migrations. The Presidio includes 991 acres of open space and 145 acres of native plant communities, including threatened, rare and endangered species. Habitat restoration in projects such as at
Mountain Lake and the Tennessee Hollow Watershed has allowed the reintroduction of native species including chorus frogs, western pond turtles, three-spine stickleback fish, the San Francisco forktail damselfly, checkerspot butterfly and California floater mussels.

The Presidio Nature Challenge launches with opening remarks at the Presidio Officers’ Club, at 9:00 am, followed by an update on the Trust’s 2018-2019 Open Space projects. Participants will then disperse into the field, as they’re coached by Presidio staff on using the iNaturalist app and the best ways to discover the rich array of species across the park’s marshes, beaches, forests and wetlands. Data will be downloaded at the Officers’ Club at the conclusion of the event. Organizers advise to download the app prior to arrival, and read suggestions on how to register and what to bring for a successful event. Google phones and tablets are generously made available by
Project Homeless Connect for those who do not have smart phones. For those going entirely analog, there will be art supplies and sketching activities available.​

For a complete list of Bay Area BioBlitzes, please visit:

City Nature Challenge Website:

For other Earth Week events at the Presidio please visit:

About the Presidio and the Presidio Trust The Presidio Trust is a federal agency that manages the Presidio of San Francisco, a national park at the heart of the 82,000-acre Golden Gate National Recreation Area. In partnership with the National Park Service and the non-profit Golden Gate National Parks Conservancy, the Presidio Trust brings alive the park’s historic, natural, and recreational assets for the inspiration, education, health, and enjoyment of all people at no cost to taxpayers. Spanning nearly 1,500 acres in a spectacular setting at the Golden Gate, the Presidio is defined by its history, spectacular views, natural habitats, and beautiful opens spaces. It is home to 3,000 residents and 200 tenant organizations, many of which welcome and serve the public. The Presidio Trust is focused on welcoming all to the national park experience, protecting and enhancing the environment, and operating in service to the public. Learn more at

About the California Academy of Sciences The California Academy of Sciences is a renowned scientific and educational institution dedicated to exploring, explaining, and sustaining life on Earth. Based in San Francisco’s Golden Gate Park, it’s the only place in the world to house an aquarium, planetarium, and natural history museum, as well as innovative programs in scientific research and education—all under one living roof.

Attention Calendar Editors:

Presidio Nature Challenge 2018
Date: Saturday, April 28
Time: 9 am to 1 pm
Place: Begin at the Presidio Officer’s Club, 50 Moraga Avenue, San Francisco
Phone: 415-561-4323
Price: Free
The Presidio Nature Challenge is a chance to discover and record the many wild plants and animals that thrive in the Presidio in what is called a “BioBlitz” —pairing volunteers with professional naturalists on a scientific adventure. Just bring your smartphone with the iNaturalist app, your curiosity, and your powers of observation to help catalog the natural wonders of our parks and open spaces. All of the observations recorded during the day will help San Francisco win the 2018 City Nature Challenge—a competition between more than 60 cities worldwide to see who can find the most species, and engage the most people. Help us celebrate and record the rich biodiversity of the Presidio.


Contact Us

Presidio Trust Media Relations

Lisa Petrie

(415) 264-7787