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San Bruno Mountain Watch

San Bruno Mountain Watch

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Sponsor and Partner
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General info
For over 45 years San Bruno Mountain Watch has been working to preserve and protect San Bruno Mountain. Located just south of San Francisco, it’s one of the biggest open spaces in urban America, and the largest and closest wilderness to a population of over one million people. Encompassing grasslands, ancient oak forests, and riparian habitats, parts of the Mountain are remarkably intact—it is home to 13 rare and endangered species and three endangered butterflies. These rare and endangered butterflies struggle to survive on San Bruno Mountain, just south of San Francisco. All three butterflies are federally listed as endangered and the Mountain is the only place on the planet where these three species coexist. These butterflies have very specific habitat requirements - and butterfly habitat on San Bruno Mountain is under constant threat. Loss of habitat means loss of butterflies. Volunteers and staff from San Bruno Mountain Watch will work to restore the overall diversity and function of the mountain’s ecosystems to ensure that these butterflies will survive generations to come.