2016
DOI: 10.1111/evo.12988
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Coos, booms, and hoots: The evolution of closed‐mouth vocal behavior in birds

Abstract: Most birds vocalize with an open beak, but vocalization with a closed beak into an inflating cavity occurs in territorial or courtship displays in disparate species throughout birds. Closed-mouth vocalizations generate resonance conditions that favor low-frequency sounds. By contrast, open-mouth vocalizations cover a wider frequency range. Here we describe closed-mouth vocalizations of birds from functional and morphological perspectives and assess the distribution of closed-mouth vocalizations in birds and re… Show more

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Cited by 39 publications
(41 citation statements)
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References 109 publications
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“…Nowicki's paper of 1987 [111] showed that not just the syrinx, but the vocal tract contributed to the sound quality, at least in filtering sound [112], although, as a singular tube, it would not contribute to our understanding of lateralization, but can explain certain auditory characteristics [113,114]. Indeed, Hoese and colleagues [101] provided evidence experimentally of an important coordination between beak and sound output (Figure 4), showing that restricting beak movement or closed beak vocalizations [115] changed the tonal quality of song and caused frequency-dependent changes in amplitude that may alter the message and, thus, require some instructional cues from the forebrain, and these may indeed be lateralized. , of the European black-billed magpie, Pica pica, a relative in name only of the Australian magpie, which was named after the European magpie.…”
Section: Figure 3 Syrinx Anatomy the Syrinx Of Gymnorhina Tibicen (mentioning
confidence: 99%
“…Nowicki's paper of 1987 [111] showed that not just the syrinx, but the vocal tract contributed to the sound quality, at least in filtering sound [112], although, as a singular tube, it would not contribute to our understanding of lateralization, but can explain certain auditory characteristics [113,114]. Indeed, Hoese and colleagues [101] provided evidence experimentally of an important coordination between beak and sound output (Figure 4), showing that restricting beak movement or closed beak vocalizations [115] changed the tonal quality of song and caused frequency-dependent changes in amplitude that may alter the message and, thus, require some instructional cues from the forebrain, and these may indeed be lateralized. , of the European black-billed magpie, Pica pica, a relative in name only of the Australian magpie, which was named after the European magpie.…”
Section: Figure 3 Syrinx Anatomy the Syrinx Of Gymnorhina Tibicen (mentioning
confidence: 99%
“…Thereby, the inflation of the throat may act to boost radiation of the signal, amplifying the low sounds (Riede et al 2016). Generally, the fundamental frequency of vocalizations in birds that vocalize with the mouth closed is lower than predicted from body size alone (Riede et al 2016), and thus, the duetting posture of White-browed Coucals described in this study is most likely a mechanism to support the production and radiation of particularly low-frequency vocalizations.…”
Section: Discussionmentioning
confidence: 62%
“…Thereby, the inflation of the throat may act to boost radiation of the signal, amplifying the low sounds (Riede et al 2016). Generally, the fundamental frequency of vocalizations in birds that vocalize with the mouth closed is lower than predicted from body size alone (Riede et al 2016), and thus, the duetting posture of White-browed Coucals described in this study is most likely a mechanism to support the production and radiation of particularly low-frequency vocalizations. Low-frequency vocalizations of birds are thought to be candidates of honest signals of body size (Ryan and Brenowitz 1985;Gil and Gahr 2002) because their production is constrained by difficulties with producing loud low-pitched sounds (reviewed by Zollinger and Brumm 2014).…”
Section: Discussionmentioning
confidence: 62%
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“…Although much attention has focused on habitat use in relation to habitat loss due to energy development (Pruett et al 2009, McNew et al 2014, Winder et al 2014, no studies have quantified landscapescale acoustic propagation by lekking prairie-chickens. In particular, the propagation of male prairie-chicken's primary advertising vocalization (Robel 1966, Sparling 1981a, Riede et al 2016), the boom, or boom chorus when multiple males are vocalizing simultaneously (Höglund andAlatalo 2014, RehbergBesler et al 2017), has not been investigated. Understanding this phenomenon could aid in the management of Greater PrairieChickens and other lekking grassland birds Patricelli 2010, Blumstein et al 2011).…”
Section: Introductionmentioning
confidence: 99%