their wildlife cameraman says the waiting is the hardestst pa.ephanie sy for our series "into the wild." >> reporter: think of it as the original reality tv. but capturing drama in the wild isn't easy. andy casagrande's wildlife photography has been featured in some the criticallll acclaimed nature programs. andy captures the money shots. the stalk, the chase, the takedown and the kill. >> so, we just got a cheetah kill. kind of happened in tall grass but i got the shot. here we go again! heading north on the polar bear express. >> reporter: but his job requires constant travel and incredible patience. >> i'm a professional at waiting. seriously. this is what i do. right camera? >> reporter: endless waiting, unpredictable weather and equipment snafus are part of the job. >> low temperature. cannot access media. what? my camera just froze. come on, you [ bleep ] camera. >> reporter: is it frustrating to be at the mercy of nature and the weather all the time? >> extremely, yeah. i kind of have a joke is that sometimes you give these animals nicknam