Big Bend Conservancy
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Site #4 is one of our favorites.Nice report.
Another great, detailed Flash investigation! A good candidate for the builder of those nests would be Common Raven (Corvus corax). Or, possibly, Chihuahan Raven (Corvus cryptoleucus). I’m not certain of the relative breeding distribution of those two species throughout the park. My guess is that the nests on the ground were deliberately knocked down after breeding season by maintenance crews. Possibly a fool’s errand, as ravens exhibit a great deal of nest-site fidelity and will re-use and/or rebuild nests at the same location year after year after year.
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