https://redandthepeanut.blogspot.com/2011/05/northern-parulas-usnea-lichens-and.html?showComment=1305881085648&m=0
Red and the Peanut: Northern Parulas, Usnea lichens, and the Little Miami River
Every spring Rick and I listen for the return of the Northern Parulas. In 2007 we were lucky because a male took up temporary residence in o...
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