Bonnie the orangutan has learned to whistle...

 At the National Zoo in Washington, D.C., Bonnie the orangutan has been amazing researchers with her special talent: Bonnie knows how to whistle. 

Those notes are a symphony to the ears of primate researchers who believe her musical abilities could lead to a greater understanding of how human speech evolved.

"I think what makes it significant is that you can train apes to whistle, but no one trained her to do it. She decided to do it on her own," says Erin Stromberg, who works in the National Zoo's Great Ape house and helps care for the orangutans. More...

See also:

1. Orang-utans know how to give and take favours...
2. Monkeys and apes have a sense of morality...
3. India: monkeys fall to their deaths, temples are erected...