More about birds
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Ravens are among the most fascinating birds to observe here in the Headlands. Their antics are unpredictable, and you never know what these ultra-intelligent “corvids” will be up to next.
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Large and majestic, the Ferruginous Hawk is arguably one of the most beautiful raptors we see at the GGRO. And it’s spotted from Hawk Hill no more than 20 times in a given year—adding to its allure and mystique.
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One of the things winter visitors in the Marin Headlands might notice is the abundance of waterfowl at Rodeo Lagoon. Most people brush the birds off as just “ducks,” but a closer look reveals a far more complex avian world.
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As a nature lover hiking through the Marin Headlands, you might be able to quickly identify a couple of raptors flying overhead. At first glance, you also might discern their relative sizes. But what does that tell you about the sex of the raptors?
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In addition to our annual hawkwatch, banding, and radiotelemetry programs, the Golden Gate Raptor Observatory has launched several new research projects to further understand raptor movements and health. Read on to discover how you can help!
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Every autumn, up to 19 species of birds of prey make their annual appearance over the Marin Headlands. With tens of thousands of raptors counted during the fall migration, it’s the largest flight of its kind in the western U.S.! Read on for hawk-watching tips from our Golden Gate Raptor...
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Hawk Hill isn’t just a spot for watching raptors. In the fall, visitors who point their binoculars at smaller birds might be treated to the aerial acrobatics of migrating swifts. Learn more about these amazing—and mysterious—insectivores.
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To humans, bird vocalizations can be inspiring and soothing—or annoying, in the case of those early morning arias. But for birds, they perform critical communication functions. Read on to learn about five types of vocalizations, and what they teach us about birds’ surroundings.
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Feathers are a uniquely avian adaptation—or are they? While feathers can only be seen on birds today, evidence has shown that many dinosaurs also had feathers. Read on to learn about the variety—and possible purposes—of dinosaur feathers.
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The trailside discovery of a Great Horned Owl tail feather sparked this rumination: What are some of the many adaptations that make owls such proficient hunters in the dark, quiet night? Take wing and learn more about their unique traits.
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Even Charles Darwin, the preeminent biologist, had trouble defining a species. The more we learn, the harder it gets. Life does not always supply black-and-white categories—which can impact how we conserve and protect the species around us.
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It seems remarkable that we can pinpoint an exact date—November 4, 1769—when Europeans first caught sight of San Francisco Bay. Afterward, nothing would ever quite be the same, ecologically or anthropologically, in this grand watershed. Or would it?
