For my learned fellows, Can an infrared camera or scope see a night flying bird over head or would there not be enough heat radiating off it's feathers to create a heat signature? I was reading something about peregrines migrating at night and since harvest numbers are calculated by peregrine counts at hawk watch stations to some degree and if they weren't seen at night, the counts would not be a fair count. I was thinking they could be counted if they can be seen. Maybe just lights aimed from the ground would work. I hear waterfowl passing over my place in the fall but can't see them unless they pass between me and the moon and most do not.