It is true that armadillos are very territorial creatures. (Some species more so than others). Armadillos have been known to mark their territory with urine, feces and excretions from sweat glands that are located on their eyelids, nose and feet. Some species secrete excretions from sweat glands located in their anal glands. Female armadillos tend to have exclusive, clearly defined territories, while males have larger territories that overlap, and coincide with the ranges of several females. It is for this reason that it is not uncommon to often find unrelated males sleeping in the same burrows from time to time.
It is also not uncommon for armadillos to get into a territorial dispute; however this does not always happen. The creatures settle these disputes by kicking and chasing one another. Despite being cute creatures, since armadillos have a territorial nature they can be quite aggressive when they feel threatened. Individual armadillos may be able to recognize one another through scent marking.
The armadillo is an extensive burrower. Sometimes a single armadillo can be found maintaining anywhere up to 12 burrows in their territory. A typical burrow is roughly 8 inches wide, 7 feet deep, and up to 25 feet long. These burrows can usually be found in moist, firmly packed soil. In residential areas they have been found under the foundation of homes and around air conditioning slab.