There are more than 12,000 species of ants identified in the world. In the United States, there are over 1,000 species. So, it can be difficult to figure out what ants you're dealing with in and around your home. Every homeowner should know what carpenter ants look like. Of all the ants that invade homes in the Greater Richmond and Central Virginia area, carpenter ants are the worst because they have the ability to cause extensive wood damage. This is the most important difference between nuisance ant species and carpenter ant species.