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THE WILSON JOURNAL OF ORNITHOLOGY • Vol. 124. No. 1. March 2012 
Negro (Forsberg et al. 2000. Almeida-Filho and 
Miranda 2007, Silva et al. 2007) could influence 
bird distribution in this region if they serve as 
vicariance mechanisms (Ribas et al. 2011). 
We call attention to the urgent need to review the 
currently recognized AOEs for Amazonian birds. The 
last review of these areas w as compiled over 20 years 
ago (Cracraft 1985), and taxonomic and geographical 
distribution data have continued to accumulate. The 
areas of endemism for Amazonian birds should be re¬ 
evaluated through modem biogeographic approaches 
(Morronc and Crisci 1995, Szumik and Goloboff 
2004) facilitated by continuous progress increasing 
the data base of geographical distribution and 
systematics of neotropical birds. 
ACKNOWLEDGMENTS 
SHB acknowledges Capes. WWF-Brazil, and Fundajao 
Vitdria Ama/onica for financial and technical support. We 
thank Brazil's federal agency of environmental protection 
(IBAMA) for permission to work in Jaii National Park. Luis 
Fdbio Silvcira, Maria Luiza. Alexandre Aleixo, and Mario 
Cohn-Haft kindly permitted us to examine bird collections 
under their care, Marcelo Moreirn kindly prepared the 
maps. Morton Isler, Charles Zartman. and Camila Ribas 
helped in first versions of the paper. We appreciate the 
improvements in English usage by Pltil Stouffcr through the 
Association of Field Ornithologists' program of editorial 
assistance. We are also grateful to J. M. Bates and Jurgen 
Haffer for careful reviews of this paper and useful 
suggestions. We dedicate this paper to the memory of Dr. 
Jurgen Haffer for his inestimable contribution to the 
biogeography of neotropical birds. 
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