Revista Brasileira de Ornitologia 26(2): 151–186. ARTICLE June 2018 Breeding biology of Neotropical Accipitriformes: current knowledge and research priorities Julio Amaro Betto Monsalvo1,3, Neander Marcel Heming2 & Miguel Ângelo Marini2 1 Programa de Pós-graduação em Ecologia, IB, Universidade de Brasília, Brasília, DF, Brazil. 2 Departamento de Zoologia, IB, Universidade de Brasília, Brasília, DF, Brazil. 3 Corresponding author:
[email protected] Received on 08 March 2018. Accepted on 20 July 2018. ABSTRACT: Despite the key role that knowledge on breeding biology of Accipitriformes plays in their management and conservation, survey of the state-of-the-art and of information gaps spanning the entire Neotropics has not been done since 1995. We provide an updated classification of current knowledge about breeding biology of Neotropical Accipitridae and define the taxa that should be prioritized by future studies. We analyzed 440 publications produced since 1995 that reported breeding of 56 species. There is a persistent scarcity, or complete absence, of information about the nests of eight species, and about breeding behavior of another ten. Among these species, the largest gap of breeding data refers to the former “Leucopternis” hawks. Although 66% of the 56 evaluated species had some improvement on knowledge about their breeding traits, research still focus disproportionately on a few regions and species, and the scarcity of breeding data on many South American Accipitridae persists. We noted that analysis of records from both a citizen science digital database and museum egg collections significantly increased breeding information on some species, relative to recent literature. We created four groups of priority species for breeding biology studies, based on knowledge gaps and threat categories at global level.