If you haven't been avidly watching the latest BBC natural history series, you're missing a treat.
The BBC was granted extraordinary permission to film isolated groups of 'uncontacted' Brazilian tribes, by accompanying a regular monitoring flight run by the Indian Affairs group.
Using specialist stabilised zoom lens, they caught incredible images of these groups from over a mile away.
For more information on these 'uncontacted' tribes and for further images, follow this link.
Here's an extract from the BBC film. The full programme is currently available on iplayer. For more info see here.