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Common Murre Nesting Colony

Common Murre 150

The cliffs of Castle Rock provide security for over 100,000 breeding Common Murres every year, making it one of the largest breeding colonies on the Pacific coast.

Castle Rock Wildlife

About the Complex

Humboldt Bay

Located in Northwestern California, Humboldt Bay NWR Complex provides a variety of valuable habitats for birds, mammals, fish, reptiles, amphibians, and insects.

Castle Rock is managed as part of the Humboldt Bay .

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About the NWRS

National Wildlife Refuge System


The National Wildlife Refuge System, within the U.S. Fish and Wildlife Service, manages a national network of lands and waters set aside to conserve America’s fish, wildlife, and plants.

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Watch Real Time Video of Sea Birds on Castle Rock

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In cooperation with Humboldt State University, the National Park Service, San Francisco Bay National Wildlife Refuge, the U.S. Geological Survey, and the U.S. Coast Guard, Humboldt Bay NWR installed a webcam on Castle Rock in 2006 to provide a live feed of California's second largest nesting colony for public enjoyment and scientific inquiry. Click the link below to watch a live feed of the Castle Rock webcam, which is available 7 days a week during daylight hours.

The Webcam operates seasonally, based on weather conditions April - August
Page Photo Credits — All photos courtesy of USFWS unless otherwise noted.
Last Updated: Apr 15, 2017
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