Behaviour 2019
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Vocal and acrobatic display differences in a sub-species of the Golden-collared Manakin
Ioana Chiver1,2, Maykol Miller3, Alicia Ibáñez4. 1University of Liege, Liege, , Belgium; 2Smithsonian Tropical Research Institute, Panama City, , Panama; 3University of Panama, Changuinola, Bocas del Toro, Panama; 4Ramsar Regional Center for the Western Hemisphere, Panama City, , Panama

Manakins (family Pipridae) have been important in studies examining the evolution of courtship displays and the physiological mechanisms supporting these. Less is known about geographic variation in courtship display within closely related taxa. Here, we examined differences in the vocal and acrobatic display of a sub-species of the Golden-collared Manakin (Manacus vitellinus amitinus) endemic to Escudo de Veraguas Island, Panama. We found that the “cheepoo” call, used as part of the courtship routine, has a higher average frequency for island males. This was unexpected as males are ~30% larger and are likely able to produce lower frequency calls. We also found a difference in the performance of the “rollsnap” element of the acrobatic display, which consists of repeated wingbeats above the head, at up to 50Hz. Males on the island produce shorter and slower rollsnaps, which could point to differences in muscle physiology. Differences in vocal and acrobatic display may be due to divergent female preference on the island and/or to adaptation to the island acoustic environment. Our results suggest that in addition to movement speed, females may attend to display salience or loudness.