David Attenborough captures a three-toed sloth and witnesses leafcutter ants at work as he travels to South America in search of rare and interesting animals.

David Attenborough's exploration of the forests of what was then British Guiana continues, as he searches for rare animals to film.

David Attenborough reports on the rare animals he found on an expedition to then British Guiana.

Another report from the expedition that recently returned from filming and capturing rare animals in the forests of South America.

David Attenborough introduces film of fishing and bird hunting trips. He also uses special apparatus to demonstrate the electricity produced by two electric eels in a tank in the studio.

David Attenborough presents a final report on his expedition to film and capture rare animals in the forests of South America.