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Credit: Image courtesy of C. Albano Tropical regions contain many of the world s species and scientists consider them hotspots due to their immense biological diversity. However, due to limited sampling our knowledge of tropical diversity remains incomplete, making it difficult for researchers to answer the fundamental questions of the mechanisms that drive and maintain diversity. In a paper published December 10 in Science, an international team of scientists has produced the first complete, species-level phylogeny of a major group of tropical birds known as the suboscine passerines. Passerines are the largest order of birds and among the most diverse orders of terrestrial vertebrates. The suboscine group includes more than 1,306 species and in the Neotropics they make up roughly one-third of the total avian population.

New yorkUnited statesEl pasoDistrito federalEteläuomen läiAmerican museum of natural historyUniversity of texasLiz derryberryMichaelg harveyGustavoa bravoMichael harveyCiencias naturalesRobb brumfieldDepartment of ecologyUniversity of kansasBiodiversity institute