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As part of the national Inventory and Monitoring Program of the National Park Service, the Klamath Inventory and Monitoring Network and Klamath Bird Observatory established a protocol to monitor long-term status and trends in landbird populations at National Park units in southern Oregon and northern California. This report examines detection probabilities and estimates densities using data from the first sequence of surveys in the five larger park units in the Network: Crater Lake National Park, Lassen Volcanic National Park, Lava Beds National Monument, Redwood National and State Parks, and...

The Natural Resource Publication series addresses natural resource topics that are of interest and applicability to a broad readership in the National Park Service and to others in the management of natural resources, including the scientific community, the public, and the NPS conservation and environmental constituencies. Manuscripts are peer-reviewed to ensure that the information is scientifically credible, technically accurate, appropriately written for the intended audience, and is designed and published in a professional manner.