Boyd Deep Canyon Desert Research Center

12 Nov, 06 AM - 13 Nov, 02 AM

Costa?s hummingbird (Calypte costae) and Anna?s hummingbird (Calypte anna) are closely related sister species with songs that significantly differ from one another. Comparisons of song structures of the Calypte sister species have shown that Costa?s hummingbird has simpler, possibly innate song while Anna?s hummingbird has a more complex learned song. The divergence in songs of these sister species might be caused by differences in natural and sexual selective pressures acting on each species. The hypothesis is that natural selection is stronger on Costa's hummingbird while sexual selection is stronger on Anna's hummingbird. It is predicted that stronger natural selection on Costa's hummingbird will be evident by the differences in survivorship from season to season. Sexual selection on Anna's hummingbird will be evident by differences in succesful reproductive abilities of males as reglated by female preferences.

Visit #16566 @Boyd Deep Canyon Desert Research Center

Approved

Under Project # 10770 | Research

Sexual selection and the evolution of songs in Anna's and Costa's hummingbird

graduate_student - California State University (CSU), Fullerton

Reservation Members(s)

Uyen Tran Nov 12 - 13, 2008 (2 days)
Uyen Tran Nov 12 - 13, 2008 (2 days)
Uyen Tran Nov 12 - 13, 2008 (2 days)

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Mayhew housing facilities 3 Nov 12 - 13, 2008