Odorous House Ant:
This species is a scavenger/predator ant that will eat most household foods, especially those that contain sugar. Indoors they will colonize near heat sources or in insulation. In hot and dry situations, nests have been found in house plants and even in the lids of toilets. Outdoors they tend to colonize under rocks and exposed soil. They appear, however, to form colonies virtually anywhere, in a variety of conditions.
A typical fire ant colony produces large mounds in open areas, and feeds mostly on young plants, seeds, and sometimes crickets. Mounds can reach 18 inches in height, depending on the type of soil. Fire ants cause painful stings that raise a small welt.
Carpenter ant species reside both outdoors and indoors in moist, decaying or hollow wood. They cut tunnels into the wood grain to provide passageways for movement from section to section of the nest. Certain parts of a house, such as around and under windows, roof eaves, decks and porches, are more likely to be infested by Carpenter Ants because these areas are most vulnerable to moisture.