Every year, billions of birds undertake intrepid journeys between temperate regions in North America and their tropical ...

A genetic analysis of the world's iguanas may have just solved an enduring mystery of how the creatures ended up in Fiji. Iguanas are native to the Western Hemisphere, but four species live in the ...

The humble iguana may have have pulled off an epic migration millions of years ago, traveling from the coast of today’s Mexico to Fiji on rafts made of vegetation.

Birds Form Surprising Relationships With Other Avian Species During Migration, Study Suggests New research indicates that birds are not alone while migrating—and sharing space with other species ...

While scientists have long suspected that there might be hidden connections between certain species at stopover points used during migration, the current study utilized records of 50 songbird ...

A version of this article appears in print on , Section D, Page 3 of the New York edition with the headline: Energy Study Answers Bird-Migration Mystery. Order Reprints ...