TY - JOUR
T1 - Black Jacobin hummingbirds vocalize above the known hearing range of birds
AU - Olson, Christopher R.
AU - Fernandez-Peters, Marcela
AU - Portfors, Christine V.
AU - Mello, Claudio V.
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/3/5
Y1 - 2018/3/5
N2 - Hummingbirds are a fascinating group of birds, but some aspects of their biology are poorly understood, such as their highly diverse vocal behaviors. We show here that the predominant vocalization of black jacobins (Florisuga fusca), a hummingbird prevalent in the mountains of the Brazilian Atlantic Forest, consists of a triplet of syllables with high fundamental frequency (mean F0 ∼11.8 kHz), rapid frequency oscillations and strong ultrasonic harmonics and no detectable elements below ∼10 kHz. These are the most common vocalizations of these birds, and their frequency range is above the known hearing range of any bird species recorded to date, including hearing specialists such as owls. These observations suggest that black jacobins either have an atypically high frequency hearing range, or alternatively their primary vocalization has a yet unknown function unrelated to vocal communication. Black jacobin vocalizations challenge current notions about vocal communication in birds. Olson et al. show that the vocalizations of black jacobin hummingbirds are >10 kHz, thus above the known hearing range of birds. These vocalizations have complex acoustic features that are modulated by context and season. These findings raise novel questions about adaptations needed for high frequency vocal-motor production and perception in birds.
AB - Hummingbirds are a fascinating group of birds, but some aspects of their biology are poorly understood, such as their highly diverse vocal behaviors. We show here that the predominant vocalization of black jacobins (Florisuga fusca), a hummingbird prevalent in the mountains of the Brazilian Atlantic Forest, consists of a triplet of syllables with high fundamental frequency (mean F0 ∼11.8 kHz), rapid frequency oscillations and strong ultrasonic harmonics and no detectable elements below ∼10 kHz. These are the most common vocalizations of these birds, and their frequency range is above the known hearing range of any bird species recorded to date, including hearing specialists such as owls. These observations suggest that black jacobins either have an atypically high frequency hearing range, or alternatively their primary vocalization has a yet unknown function unrelated to vocal communication. Black jacobin vocalizations challenge current notions about vocal communication in birds. Olson et al. show that the vocalizations of black jacobin hummingbirds are >10 kHz, thus above the known hearing range of birds. These vocalizations have complex acoustic features that are modulated by context and season. These findings raise novel questions about adaptations needed for high frequency vocal-motor production and perception in birds.
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U2 - 10.1016/j.cub.2018.01.041
DO - 10.1016/j.cub.2018.01.041
M3 - Letter
C2 - 29510104
AN - SCOPUS:85042747834
SN - 0960-9822
VL - 28
SP - R204-R205
JO - Current Biology
JF - Current Biology
IS - 5
ER -