Dealing with urban noise: vermilion flycatchers sing longer songs in noisier territories
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In noisy conditions, several avian species modulate their songs in amplitude and in the temporal or frequency domains, presumably to improve communication. Most studies on how passerine birds perform such adjustments have been carried out in oscines, a group well known for the importance of learning in the development of their songs. On the other hand, suboscines, in which learning appears to have little influence on the development of their songs, have been largely neglected. We evaluated song adjustment to noise in the vermilion flycatcher (Pyrocephalus rubinus), a suboscine bird. We conducted song recordings and noise measurements at several territories within Mexico City during the length of the dawn chorus. Males living in noisier places sang long songs, while those males inhabiting quieter places sang both short and long songs. We also found evidence of individual song plasticity, as males sang less versatile songs (i.e., songs with more introductory elements) later in the morning when noise levels were higher. This individual shift in song seems to be more associated to time of the day rather than to the observed rise in noise. However, we cannot discard an effect of noise, which should be evaluated with an experiment. We discuss our results in the context of other studies with oscine passerines and other taxa and consider implications for signaling in intra- and intersexual contexts.
KeywordsVermilion flycatcher Pyrocephalus rubinus Noise Bird song Suboscine Song plasticity
Fundación Banco Bilbao Vizcaya Argentaria provided financial support during this work. The authors thank Aaron Goodman for checking the English grammar of the manuscript.
Conflict of interest
The authors declare that they have no conflict of interest.
This study complies with the current laws of the country where it was performed.
- Fernández-Juricic E, Poston R, de Collibus K, Morgan T, Bastain B, Artin C, Jones K, Treminio T (2005) Microhabitat selection and singing behavior patterns of male house finches (Carpodacus mexicanus) in urban parks in a heavily urbanized landscape in the western U.S. Urban Habitats 3:49–69Google Scholar
- Parris KM, Schneider A (2008) Impacts of traffic noise and traffic volume on birds of roadside habitats. Ecol Soc 14:29Google Scholar
- Potash LM (1972) Noise-induced changes in calls of the Japanese quail. Psychon Sci 26:252–254Google Scholar
- Ríos-Chelén AA (2009) Bird song: the interplay between urban noise and sexual selection. Oecol Brasil 13:153–16Google Scholar
- Ríos-Chelén AA, Salaberria C, Barbosa I, Macías Garcia C, Gil D (2012) The learning advantage: bird species that learn their song show a tighter adjustment of song to noisy environments than those that do not learn. J Evol Biol. doi: 10.1111/j.1420-9101.2012.02597.x