Western Yellow-Billed Cuckoos.
Most of the remaining birds are found in isolated patches of riparian habitat along rivers in Arizona, California, and New Mexico. Surveys in California during 1986-1987 found only 30-33 pairs remaining in the state, compared with an estimated 15,000 pairs in the late 1800s.
http://scvnews.com/2017/07/20/western-yellow-billed-cuckoos-commentary-by-linda-castro/
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