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Hippocampus and Spatial Memory in Brood Parasitic Cowbirds

  • Mélanie F. Guigueno
  • David F. Sherry
Chapter
Part of the Fascinating Life Sciences book series (FLS)

Abstract

Natural selection can modify cognition and its neural mechanisms if these modifications enhance fitness. Brood parasites are ideal subjects to study sex-specific adaptations in cognition and the brain because it is often females that search for potential host nests, and some species as a result show a reversal of sex-typical space use usually seen in mammals. Research from North and South America shows that female brown-headed (Molothrus ater) and shiny (M. bonariensis) cowbirds have a larger hippocampus than males, and female brown-headed cowbirds exhibit more hippocampal neurogenesis than males. Female cowbirds have better spatial memory than males in some tasks, especially tasks requiring long-term spatial memory in an ecologically relevant context. The hippocampus and spatial memory in cowbirds appear to be specialized for brood parasitism. Because of their diversity and unusual breeding biology, brood parasites offer many opportunities for investigating general questions about the adaptive modification of cognition and the brain.

Notes

Acknowledgements

We thank the reviewers, Juan C. Reboreda, Romina C. Scardamaglia, and Manolo Soler, for constructive comments on earlier drafts of this chapter.

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© Springer International Publishing AG, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Department of Natural Resource SciencesMcGill UniversitySainte-Anne-de-BellevueCanada
  2. 2.Advanced Facility for Avian Research, Department of PsychologyWestern UniversityLondonCanada

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