In many states you can, though rules on night hunting and thermal optics vary, so check your state's regulations first. A thermal scope like the Hogster R shows a coyote's body heat against cooler ground, which makes it easy to pick out in a dark field. Pair it with a caller and set up with the wind in your face.
Many hunters zero a thermal scope at 50 or 100 yards, matched to the distances they really shoot. For hogs and coyotes at night, 100 yards is a common choice. Zero on a target with a heat source, like a hand warmer behind the bullseye, so the scope can see your aim point.
You can, in two ways. A clip-on thermal mounts in front of your day scope so you keep your existing glass and zero, while a dedicated thermal riflescope like the Hogster R replaces the day scope. A dedicated scope is simpler at night: one device and one zero to manage.