Study Identifies Drivers of Rich Bird Biodiversity in Neotropics

©AMNH/B. Smith

©AMNH/B. Smith


An international team of researchers is challenging a commonly held view that explains how so many species of birds came to inhabit the Neotropics, an area rich in rain forest that extends from Mexico to the southernmost tip of South America. The new research, published today in the journal Nature, suggests that tropical bird speciation is not directly linked to geological and climate changes, as traditionally thought, but is driven by movements of birds across physical barriers such as mountains and rivers that occur long after those landscapes’ geological origins.