A film series by Heinz Sielmann.
A second showing of In the Steps of Darwin

Sielmann, the 'woodpecker man', meets the strangest 'woodpecker' of them all, a finch which is almost the only bird in the world to use a tool. This is one wonder among many on the Galapagos Islands where the animals still trust man-even the giant tortoises, now in danger of extinction.
Commentary spoken by Derek Jones.
From the West