This Behind the Scenes article was provided to Live Science in partnership with the National Science Foundation.
Ushuaia and Fairbanks are cities near the tips of the world.
The capital of Argentina's Tierra del Fuego province and the Alaskan metropolis don't share much in common. Except for a cluster of simple wood boxes on poles and the scientists and swallows who flock to them.
Both animals are part of Golondrinas de las Américas — the Swallows of the Americas, an international research project
studying the slight, swift swallow to answer larger questions about biological patterns."Looking at these birds across this huge hemispheric span of habitats provides a broader opportunity to explore relationships between the environment, temperatures and breeding," says David Winkler, a professor in Cornell University's Department of Ecology and Evolutionary Biology. He is the lead investigator for Golondrinas, funded through the National Science Foundation's Partnerships in International Research and Education (PIRE) program.
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