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. (Daniel Karp, UC Davis) With an ...
Green-rumped parrotlets can be caretakers–or killers. By Laura Baisas Published May 8, 2024 9:41 AM EDT Get the Popular Science daily newsletter💡 Breakthroughs ...
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