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    KITTLITZ'S MURRELET 

    Population: Unknown

    Habitat: Solitary places in rugged coastal mountains of the United States and Russia

    Why They Are Endangered: The Kittlitz's Murrelet is known as the most mysterious American seabird. Because of climate change and the glacial recession, these birds have experienced a huge decline in population. Other threats include habitat degradation, mortality in gill-net fisheries and commercial tour-boat traffic. (Center for Biological Diversity)