Heatseeker
Ohwoody--Heat-seeker for deer! Fantastic! One more gadget that needs batteries for me to carry along into the woods. Sorry abt the rant, but frankly I go hunting to re-connect with Nature, not to conquer Nature with Technology. And yes, I use a gun, and a lot of other modern stuff, but there is a limit.
Besides, wouldn't you have to get close enough to the deer that you could hit it with the heat sensor, before the heat sensor would be of help? Another thought: how long would it take before the down deer lost enough body heat (plus being insulated by its fur) so that the sensor couldn't sense it?
The few deer I've lost, or participated in the losing of, went up hill, down dale, through the swamp and around Robin Hood's barn. Was in on a 4-hour tracking job once, with my expert tracker friend who kept pointing out microscopic drops of blood to me. We were never close enough to sense its body heat, had we posessed the means to do so. The blood trail petered out to nothing, finally, it was dark, and there was too much foliage to see tracks.
The deer I've found (the vast majority! for which I'm duly thankful) have been short tracking jobs, if any, and mostly been obvious from 50-100 feet or more away when one got that close.
The expense aside, I'd have to have it demonstrated to me that a heat seeker would be of enough help to justify the carrying of it.