Data from: Host provisioning behavior favors mimetic begging calls in a brood-parasitic cowbird

Cynthia A. Ursino, Ros Gloag, Juan C. Reboreda & Maria C. De Mársico
The vocalizations of some young brood-parasitic birds closely resemble those of their host’s young. Such similarities might arise because hosts bestow the greatest parental care in response to their own species’ call type. We used a playback experiment to assess the effectiveness of the nestling call structures of two brood parasites, the specialist screaming cowbird (Molothrus rufoaxillaris) and the generalist shiny cowbird (M. bonariensis), in stimulating parental provisioning in a shared host, the baywing (Agelaioides...
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