What Darwin Never Knew (2009) - FAQ
Frequently asked questions about this film.
How many species of birds are there on Earth?
There are approximately 9,000 species of birds on Earth.
What is the estimated number of undiscovered species?
It is estimated that there are about 50 million species yet to be discovered.
Who directed the documentary 'What Darwin Never Knew'?
The documentary was directed by Sarah Holt.