The armadillo is a small to medium-sized mammal known for its distinctive armor-like shell. This shell is made up of bony plates covered in a tough skin, providing protection from predators. Armadillos are primarily found in the Americas, particularly in South America and Central America, but some species, like the nine-banded armadillo, have expanded their range into the southern United States. Armadillos are nocturnal and mostly insectivorous, feeding on insects, grubs, and other small invertebrates. They have a keen sense of smell, which helps them locate food underground. These animals are also known for their unique ability to curl into a ball when threatened, a behavior that enhances their defense against predators.