pulsar hd19a all i'm looking for is the heat signature it is not an id tool, you must be the id tool. learn how animals act & walk, then you will know what your looking at. that being said I can tell you if it is a coyote at night about 500 or so yards. I hunt woods in day time, so distance is a non factor. you will seen many critters, that will go unnoticed by your naked eye or even binoculars