Introduced by Jeffery Boswall

The expedition discovers howler monkeys and colourful toucans in the steamy sub-tropical jungles; water-loving capybaras - the world's largest rodent - with fly-catchers riding on their backs through the fresh-water marshes; and stealthy alligators lurking in the Rio Iguazu. Blizzards of brilliant butterflies are matched in variety only by the night-flying moths. The falls of Iguazu form the most impressive 'cataract' in the western hemisphere.
(from Bristol: first shown on BBC1)