Bill, you're right. Look at Discovery Channel: American Chopper (guys yelling at each other), Dirty Jobs, Deadliest Catch. Discovery is into "reality" not documentary. They have Animal Planet, but even their line up is heavily reality/drama.
For a while now, it has been very hard finding money to do nature films. I finally had to go to Nat Geo International for my last film and to other international markets for some films before that because the domestic nature film has been a tough sell here.
HOWEVER, believe me, when March of the Penguins made 125 million dollars, a lot of people took notice. Disney formed a whole new distribution company to do nature films and it jump started a lot of things, like the Planet Earth series from BBC.
Unfortunately, because my show is hosted, it is harder to go international because of language dubbing. It's easy to dub a purely VO (voice over) documentary into other languages, but when you have a guy on screen with lips moving, it's a problem. As a result, we have not yet worked on non-English versions of the shows. We do have an international distributor who will be taking the film to English markets.
Jonathan