Very small. Appears to be brown but in some lights it also can look black. Has 6 legs plus 2 antennae. My wife said she saw one fly once. It mostly appears in bathrooms on tile floors and on hard counters. I have not found one in the kitchen. I have dug through all makeup containers and all food containers holding cereal, grains, etc. Cannot find a colony of these darn things. I kill 20+ per day so they are living somewhere. They are definitely most prevalent in our master bathroom but again I can’t find a source. They are simply 5 of them randomly spread out every time I go in there. I am in Minnesota.