For the first time, researchers have estimated the Spotted Owl population across the entire Sierra Nevada ecosystem. The analysis, which was led by researchers from the University of Wisconsin-Madison and the Cornell Lab of Ornithology's K. Lisa Yang Center for Conservation Bioacoustics, suggests that there are 2,218 to 2,328 adult owls on federally managed lands. This research is published in the journal Ecological Indicators . The Sierra Nevada is the home of the California Spotted Owl, one of three subspecies of Spotted Owl, and the only one that does not yet have federal protection under the Endangered Species Act.

https://www.miragenews.com/new-audio-technique-takes-census-of-sierra-1073314/

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