Infiray mah50r. Last year say $3,800.
This is a handheld thermal viewer that is also intended to go on the front of a rifle scope.
Not at all ment to be used while driving. I had it Bluetoothed to my phone and was just goofing around. Still just amazing.
Infiray makes a unit for cars that I would have if I did more driving during hours of high deer activity. If I remember correctly around $800.
Please note that thermal loose there advantage with warm/hot sunny days, even 2 hours after sunset. Still work but the greater temp difference between deer and surrounding landscape the easier to see the warm creatures.
Also thermal does not work through glass.