Jane Goodall, known for her ground-breaking studies involving chimpanzees, has died aged 91.

A post on her institute's Facebook page said she died on Wednesday morning from natural causes while in California as part of a speaking tour.

"Dr. Goodall's discoveries as an ethologist revolutionized science, and she was a tireless advocate for the protection and restoration of our natural world," said the post.

Goodall was widely considered the world's foremost expert on chimpanzees.

She began her research when she was 26, observing the primates in east Africa and revealing their capability to engage in complex social behaviours.

Please use Chrome browser for a more accessible video player 2:28

June: Wildlife across Africa is 'disappearing'

The primatologist spoke to Sky News in Jun

See Full Page