>> freezing and now bruised, he has to get out. >> the wind is not helping because i'm starting to shiver. so, when you start shivering, you start getting cramps in the water too. so, you've got to be real careful. >> the conditions force mauricio to give up for the day. >> as everybody that does natural history knows, this is a waiting game. so, you have to have a tremendous patience. you have to stay focused and stay on the subject and on the story line. >> with time running out, mauricio sticks to the plan. and it pays off. the chungungo are no longer