1. Programa de Pós-Graduação em Biologia Animal UFPE, Federal University of Pernambuco, Recife, Pernambuco, Brazil and Laboratory of Avian Ecology & Evolution, Department of Zoology, Federal University of Pernambuco, Recife, Pernambuco, Brazil
2. Laboratory of Avian Ecology & Evolution, Department of Zoology, Federal University of Pernambuco, Recife, Pernambuco, Brazil