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Breathing rarified air high in the Andes at an average altitude of 13,000 feet presents certain unique challenges for any living organism. But for small birds such as wrens, it presented an opportunity to adapt to the challenges of the altitude and...

The albatross and the hummingbird have something in common – both are very slow egg producers for their size. A new study by UNM researchers shows how and why wild bird species vary in their rates of egg production. The study was a collaboration between ...