Ants, those little six-legged insects that arrive in the thousands and never seem to want to leave your home or yard, are a yearly challenge to any home owner. There are more than 12,000 species of ants in the world. Some ants are attracted to sweets, like sugar. Other ants are attracted to grease. Some will skip the sugar in your cabinets and go for the flour. Determining what kinds of ants have invaded your living space can be nearly impossible for anyone except an expert.