The White Diamond movie review (2005)
Werner Herzog's documentary "The White Diamond" is not about a diamond but about an airship, one of the smallest ever built, designed to float above the canopy of equatorial rain forests. Every niche in the jungle is exploited by plants, animals and insects that have evolved to make a living there, and biologists believe that undiscovered species might live their entire lives 80 or 120 feet from the ground.
Source: rogerebert.com