There are many species of armadillos that are endangered and/or threatened. This is due to many different reasons including human encroachment, slash and burn farming, and hunting. Deaths due to domestic dogs also account for a large percentage of the problem. There are about twenty different species of armadillos. Of these twenty different species, only one appears to be increasing in number. This species is known as the nine banded armadillo.
Within the last hundred years, the nine banded armadillo has expanded its home range northward into the United States and has moved as far west as Colorado and as far north as Illinois. There have even been the occasional sightings of them even farther north. Cold weather will eventually put an end to the spread of armadillos as they cannot tolerate even relatively short periods of extreme cold, although they are equipped with large fat reserves that help them insulate their bodies. Species such as the giant armadillo are featured on the endangered species list and are in grave danger of reaching extinction.