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Data from: Partners coordinate territorial defense against simulated intruders in a duetting ovenbird


Diniz, Pedro et al. (2020), Data from: Partners coordinate territorial defense against simulated intruders in a duetting ovenbird, Dryad, Dataset,


Duets in breeding pairs may reflect a situation of conflict, whereby an individual answers its partner’s song as a form of unilateral acoustic mate guarding or, alternatively, it may reflect cooperation, when individuals share in territory defense or safeguard the partnership. The degree of coordination between the sexes when responding to solo versus paired intruders may elucidate the function of songs in duets. We examined this issue in a study with rufous horneros (Furnarius rufus), a duetting, socially monogamous Neotropical species with low levels of extra-pair paternity. We exposed social pairs during the non-breeding season to playbacks of duets, male solos, female solos, and control heterospecific songs. Partners approached all conspecific stimuli together and responded by singing quickly, at higher rates and by coordinating ~80% of their songs into duets. For both sexes, most response variables (seven of nine) did not vary across conspecific treatments. These results suggest that partners duet and coordinate behaviors to cooperatively defend common territories. However, females spent more time in territorial vigilance and partners were highly coordinated (correlated responses) in response to duets and female solos in comparison with male solos. This indicates that female intrusions (paired or solo) might be more threatening than male intrusions in the non-breeding season, especially for territorial females, and that females are less cooperative with their partners in territory defense against male intruders.


Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Award: 1

Conselho Nacional de Desenvolvimento Científico e Tecnológico, Award: 141178/2015‐9,471945/2013‐7

Animal Behavior Society