Scientists unlock secret of why hummingbirds hum – The Guardian

ScienceResearchers use 3D sound mapping to show aerodynamic forces during flight explain eponymous sound
Hummingbirds might be instantly recognisable from their eponymous sound, but the cause of the characteristic has long been a mystery.
Now researchers say they have cracked the conundrum, finally taking the hmm? out of hummingbirds.
David Lentink, the assistant professor of mechanical engineering at Stanford University and a co-author of the research, says that while the hum was known to be linked…

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