This is without doubt the best thing I have seen on television for years. The photography, narration and general story telling of the lives of the animals is simply breath-taking.
Episode 1 was animals that live on islands. As others have mentioned I have never seen such a more terrifying piece of natural-history photography in my life. I won't spoil it for anyone who hasn't seen it or caught it on YouTube but I never thought I would be shouting at the TV for Iguana's to run.
Episode 2 was mountain living wildlife from Grizzly Bears coming out of hibernation to Snow Leopards.
This programme is one of the few examples which envelopes you in its documentary telling. You are seeing things for the first time and you are left with wanting more. Roll on episode 3, jungles.