Western University Scholarship@Western Electronic Thesis and Dissertation Repository 4-15-2020 10:30 AM Chemical Communication in Songbirds Leanne A. Grieves The University of Western Ontario Supervisor MacDougall-Shackleton, Elizabeth A. The University of Western Ontario Graduate Program in Biology A thesis submitted in partial fulfillment of the equirr ements for the degree in Doctor of Philosophy © Leanne A. Grieves 2020 Follow this and additional works at: https://ir.lib.uwo.ca/etd Part of the Behavior and Ethology Commons, Integrative Biology Commons, and the Molecular Genetics Commons Recommended Citation Grieves, Leanne A., "Chemical Communication in Songbirds" (2020). Electronic Thesis and Dissertation Repository. 6926. https://ir.lib.uwo.ca/etd/6926 This Dissertation/Thesis is brought to you for free and open access by Scholarship@Western. It has been accepted for inclusion in Electronic Thesis and Dissertation Repository by an authorized administrator of Scholarship@Western. For more information, please contact
[email protected]. Abstract Avian chemical communication has been understudied due to the misconception that olfaction is unimportant or even lacking in birds. Early work focused on the olfactory foraging capabilities of seabirds because of their ecology (open ocean foraging) and large olfactory bulbs. In contrast, olfaction in passerine birds, comprising over half of all extant avian taxa, was long overlooked due to their relatively small olfactory bulbs. It is now well established that passerines can smell, and their olfactory acuity is comparable to that of macrosmatic mammals such as rats. Much of our theory on communication and mate choice has involved studying visual and acoustic signals in birds, especially passerines.