Search for Sasquatch
It seems like we keep on finding a species thought to be extinct every year, why not Sasquatch. It may be far fetched but worth some effort to put it to rest as to whether it exists or not. I like the idea of something fairly quiet with an infra red camera on board that could zero in on such a creature at night when a distinction could be made more easily between a warm body and the surroundings. Still, it won't be an easy task. There are lots of critters out there at night that have a heat signature, deer, moose, cougars, bears, etc, and most of them forage at night. I say - good luck.