title: Predatory threat of harpy eagles for yellow-breasted capuchin monkeys in the Atlantic Forest.
abstract: We describe seven encounters between different harpy eagle individuals (Harpia harpyja) and a group of yellow-breasted capuchin monkeys (Sapajus xanthosternos) in Una Biological Reserve. These interactions lasted 58 min on average. In each of those encounters, the capuchin monkeys used particular behavioral strategies against the harpy eagle that were not employed in reaction to other aerial predators. We did not observe any successful predation events, but after one of those encounters an infant disappeared from the capuchin group. As a whole, these observations indicate that the presence of harpy eagles in the group's home range increases predation risk for capuchin monkeys. The present report also suggests a reoccupation by H. harpyja of this area, as no previous recent records identify harpy eagle occurrence in Una Biological Reserve.
authors.affiliation: Department of Experimental Psychology, Institute of Psychology, University of São Paulo, Av. Prof. Mello Moraes 1721, São Paulo, SP, CEP 05508-020, Brazil. psuscke@hotmail.com.
authors.forename: Priscila
authors.initials: P
authors.lastname: Suscke
authors.affiliation: Department of Experimental Psychology, Institute of Psychology, University of São Paulo, Av. Prof. Mello Moraes 1721, São Paulo, SP, CEP 05508-020, Brazil.
authors.forename: Michele
authors.initials: M
authors.lastname: Verderane
authors.affiliation: Una Biological Reserve, Una, Bahia, Brazil.
authors.forename: Robson Santos
authors.initials: RS
authors.lastname: de Oliveira
authors.affiliation: Department of Experimental Psychology, Institute of Psychology, University of São Paulo, Av. Prof. Mello Moraes 1721, São Paulo, SP, CEP 05508-020, Brazil.
authors.forename: Irene
authors.initials: I
authors.lastname: Delval
authors.affiliation: Department of Experimental Psychology, Institute of Psychology, University of São Paulo, Av. Prof. Mello Moraes 1721, São Paulo, SP, CEP 05508-020, Brazil.
authors.forename: Marcelo
authors.initials: M
authors.lastname: Fernández-Bolaños
authors.affiliation: Department of Experimental Psychology, Institute of Psychology, University of São Paulo, Av. Prof. Mello Moraes 1721, São Paulo, SP, CEP 05508-020, Brazil.
authors.forename: Patrícia
authors.initials: P
authors.lastname: Izar
mesh_terms: D000818:Animals; D001938:Brazil; D016646:Cebinae / Q000502:physiology*; D020307:Eagles / Q000502:physiology*; D005260:Female; D020387:Food Chain; D008297:Male; D009043:Motor Activity; D011235:Predatory Behavior
keywords: Alarm call; Antipredator behavior; Harpia harpyja; Predation risk; Prey–predator interaction; Sapajus xanthosternos