OK, let me get this straight Big Jim. You heard from whom that Bigfeet hunker when copters are near? Hmmm. Just to clarify for you; infra-red picks up on heat radiation, which is almost always animals when scanning the wilderness. Movement will only make the screen images show more. And size of heat sourses make a big difference, moving or not. That's why stationary moose show well. How big is this Bigfoot? - I have spent a quarter century out in the woods and have seen just about every significant animal except cougers or wolverines; except at a zoo so that I can believe all the myriad of pics I've seen of both. And the stories of hunter and biologist captures. But Bigfeet. Nobody seems to be home.