In a paper published this month in "Primates", Dr Wich and his colleagues document findings that may shed some light on the evolution of speech. All thanks to a 30 year-old orangutan female named Bonnie, resident at the Smithsonian National Zoological Park in Washington, D.C.
Bonnie took up whistling after hearing one of her caretakers make the sound.
She was not trained, she just started whistling on her own, thereby proving that non-human primates can learn new sounds and use them voluntarily.
Here is a link to a video of Bonnie and the article from the Great Ape Trust of Iowa.
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