Black Jacobin hummingbirds vocalize above the known hearing range of birds

@article{Olson2018BlackJH,
  title={Black Jacobin hummingbirds vocalize above the known hearing range of birds},
  author={C. R. Olson and M. Fern{\'a}ndez-Vargas and C. Portfors and C. Mello},
  journal={Current Biology},
  year={2018},
  volume={28},
  pages={R204-R205}
}
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… Expand
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