There are more than one species of small brown ants such as the odorous house ant or the big headed ant. Other possibilities are the pavement ant or the thief ant. Some ants can range in color from yellow to dark brown.
The best way to identify a species of ant is too use a magnifying glass, and make note of its characteristics. For example, some ants have one connecting segment between the abdomen and gastor, while other ants have two. An ants behavior can also help identify the species. Crazy ants got their name because they appear to run frantically in all directions with no specific goal in mind. According to Ant Stuff, there are over 11,800 different species of ants in the world.