Scientists have started to notice that, like their counterparts breeding in temperate latitudes, tropical birds exhibit migratory behaviors. Now Peter Marra, director of the Smithsonian Conservation Biology Institute’s (SCBI) Migratory Bird Center, and Brandt Ryder, a research ecologist at SCBI are trying to understand why, by tracking two species of Neotropical birds in Brazil: Bare-throated bellbirds and Snail kites.
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