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Sounds that animals make can be really different, and it turns out that there's a reason why some species communicate with certain sounds.

Thanks also to our Patreon patrons https://www.patreon.com/MinuteEarth and our YouTube members.
To learn more, start your googling with these keywords:
frequency - how often a wave occurs in a certain unit of time
Hertz - a unit of frequency (Hz), the number of waves that occus in a second
pitch - a perceptual property of sounds that allows their ordering on a frequency-related scale
echolocation - the location of objects by reflected sound
refraction - the change in direction of a wave
diffraction - the bending of waves around obstacles and the spreading out of waves beyond openings
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Arch, V. A. and P. M. Narins. 2008. “Silent” signals: selective forces acting on ultrasonic communication systems in terrestrial vertebrates. Animal Behaviour 76: 1423–1428. https://www.mn.uio.no/cees/english/research/news/events/research/journal-clubs/eef/2008/silent-signals.html

Bedard Jr. and T. M. Georges. 2000. Atmospheric Infrasound, Physics Today, 53(3): 32-37. https://psl.noaa.gov/programs/infrasound/atmospheric_infrasound.pdf

Ladich F. and H. Winkler. 2017. Acoustic communication in terrestrial and aquatic vertebrates,” Journal of Experimental Biology 220: 2306–2317. https://jeb.biologists.org/content/jexbio/220/13/2306.full.pdf

Michelsen, A. and O.N. Larsen. 1983. Strategies for acoustic communication in complex environments. In: Neuroethology and Behavioural Physiology (ed Huber, F. and Markl, H.) pp. 321-331 Berlin: Springer-Verlag. https://link.springer.com/chapter/10.1007/978-3-642-69271-0_23

Narins, P.M., A.S. Stoeger, and C. O'Connell-Rodwell. 2016. Infrasonic and seismic communication in the vertebrates with special emphasis on the Afrotheria: An update and future directions. In Vertebrate Sound Production and Acoustic Communication (ed. R. A. Suthers, W. T. Fitch, R. R. Fay and A. N. Popper), pp. 191-227. Cham: Springer. https://link.springer.com/chapter/10.1007/978-3-319-27721-9_7

Direct download: Why_Wolves_Dont_Chirp.mp4
Category:general -- posted at: 1:20pm EST