David Attenborough takes a look at the male proboscis monkey, the most bizarre of the creatures that live in the suffocating mangrove swamps of Borneo, with its huge, pendulous and distinctly odd nose. He also examines glutinous mud-flats that heave with fish that walk on their fins, and multi-coloured crabs that signal with claws almost as grotesque as the monkeys in the trees above. Show less