Whistling orangutans?

Science Daily has a story of Bonnie the whistling orangutan[*1] :

Bonnie, a 30-year-old female orangutan living at the Smithsonian National Zoological Park in Washington, D.C., began whistling – a sound that is in a human’s, but not an orangutan’s, repertoire – after hearing an animal caretaker make the sound.

They go on to be all sciencey and stuff about how it might give a clue to the evolution of speech, but for me, it’s all about the picture:

Credit: Photo courtesy of Smithsonian National Zoological Park.