Black-cheeked woodpecke (IMAGE)
Caption
Cavity-nesting birds, like this black-cheeked woodpecker in Ecuador, rely on natural cavities, like the hole in this tree, for nesting and reproductive success.
Credit
Daniel Karp, UC Davis
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Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted.
License
CC BY-NC-ND