Did you know that you could survey for bats using acoustic detectors that record echolocation calls? The calls are unique to each species so it's a valuable non-invasive technique to survey for bats. This year, the Don Edwards San Francisco Bay NWR was part of the North American Bat Monitoring Program (nabatmonitoring.org). Staff from Bat Conservation International deployed a single recorder for one week at Bair Island and recorded two bat species: the Hoary Bat (Lasiurus cinereus) and the Brazilian free-tailed Bat (Tadarida brasiliensis). Bats play an important role in the ecosystem by consuming insects and pollinating plants. To learn more about bats, visit the U.S. Fish and Wildlife Service story about bats and Bat Conservation International (batcon.org).
Mallard Slough Trail is closed due to construction as well as sections of Alviso Slough Trail at Don Edwards San Francisco Bay National Wildlife Refuge in Alviso California. South San Francisco Bay Shoreline Project (Phase I) between the Alviso Slough/Guadalupe River and Coyote Creek is underway.
For more information see the South San Francisco Bay Shoreline Project fact sheet
2 Marshlands Rd.
Fremont, CA 94555.
OPEN The weekends of December 3rd & 4th, 10th & 11th, and 17th & 18th.
9:00 am - 3:00 pm.
Environmental Education Center
1751 Grand Blvd
Alviso, CA 95002
CLOSED until further notice.
1 Marshlands Rd.
Fremont, CA 94555
Buildings are closed on all Federal Holidays.
Vehicle entrance gate
7:00 am - 5:00 pm
Alviso, Environmental Education Center.
7:00 am - 7:00 pm
Fremont Headquarters/Visitor Center
Open sunrise to sunset.
Location and Contact Information
The nation's first urban sits on the southern end of San Francisco Bay. It is indeed a wildlife oasis in an urban sea. The refuge, created in 1972, was largely the result of grassroots efforts by the local community to protect the San Francisco Bay ecosystem. Today, it provides not only critical habitat for threatened and endangered species, but opportunities for people to enjoy the benefits of nature.
What We Do
Don Edwards San Francisco Bay National Wildlife Refuge was established to preserve and enhance wildlife habitat; protect migratory birds and threatened and endangered species; and provide opportunities for wildlife-oriented recreation and nature study for the surrounding communities.
Fifteen habitat types exist on the Don Edwards San Francisco Bay National Wildlife Refuge, contributing to the diversity of wildlife on the refuge. More than 340 plant species and 280 species of birds call the refuge home, and millions of individual birds fly through the area during peak migrations. In addition to plants and birds, the refuge provides habitat for fish, mammals, reptiles, amphibians, and invertebrates!
Whether you want to further conservation, learn more about nature or share your love of the outdoors, you’ve come to the right place. National wildlife refuges provide many opportunities for you to help your community by doing what you love. National wildlife refuges partner with volunteers, youth groups, landowners, neighbors and residents of urban communities to make a lasting difference. Find out how you can help make American lands healthier and communities stronger while doing something personally satisfying.