Besides deer protection and wildlife management in general, they're used in SAR and police - especially in mountainous or forest areas, it's just soooo much faster to send a quick-response team with thermal drones than to travel by foot or wait for a chopper to show up. Obviously in rough weather you still need a legit chopper, but for stuff like "find someone who didn't return from a hike/called for an emergency without knowing where he precisely is" they're just fine.
On the infrastructure side, you can use thermal drones in construction planning to detect if/where a building is losing heat, spot (beginning) defects in industrial installations and inspect if a power line is still working acceptably. DJI also pairs the thermal camera with a decent photo camera so you don't need to send up two drones for the job.
On the infrastructure side, you can use thermal drones in construction planning to detect if/where a building is losing heat, spot (beginning) defects in industrial installations and inspect if a power line is still working acceptably. DJI also pairs the thermal camera with a decent photo camera so you don't need to send up two drones for the job.