The nine-banded armadillo is an increasingly common sight in Missouri, particularly in the southern and central regions of the state. This small, armored mammal, native to Central and South America, has steadily expanded its range northward over the last century. Driven by a combination of changing climate, abundant agricultural land, and a lack of natural predators, these resilient creatures have established breeding populations well beyond their historical territory.
Understanding the Nine-Banded Armadillo
Identifying an armadillo is relatively straightforward due to its unique physiology. The creature is characterized by its leathery, armor-like shell composed of bony plates called scutes, which run from its head to its tail. They possess strong, curved claws perfectly adapted for digging, a long, pointed snout, and relatively poor eyesight. Their primary senses are smell and hearing, which they rely on to locate food underground. In Missouri, the species present is almost exclusively the nine-banded armadillo, named for the distinct bands of flexible tissue separating the rigid plates on its back.
Geographic Range and Habitat in Missouri
While sightings were once rare and confined to the far south, armadillos are now documented in over 60 Missouri counties. Their preferred habitat aligns with areas offering easy digging conditions and sufficient ground cover. Wooded edges, agricultural fields, and the banks of streams and rivers provide the ideal combination of soil for foraging and vegetation for shelter. They are most commonly found in counties south of Interstate 70, though their presence continues to be documented in increasingly northern regions as they adapt to the local environment.
Behavior and Nocturnal Foraging
Armadillos are primarily nocturnal animals, spending the majority of the day resting in shallow burrows they excavate with their powerful claws. These burrows, often found under root systems, near buildings, or along fence lines, can extend several feet into the ground and serve as shelter from predators and extreme weather. As night falls, they emerge to forage, using their elongated tongues to consume vast quantities of insects, grubs, and other invertebrates. This diet is the driving force behind their expansion; the rich soil of Missouri’s farmland supports a robust population of the insects and larvae that make up their staple food source.
Reproduction and the Unique Four-Offspring Trait
Reproduction in armadillos is notable for a consistent biological phenomenon. Every pregnancy results in four genetically identical offspring, all originating from a single fertilized egg. This egg divides into four separate embryos, a process known as polyembryony. The young are born fully formed, with open eyes and a degree of mobility, and they will typically remain with the mother for several months before venturing out to establish their own territories. This reproductive strategy contributes to their successful colonization of new areas.
Interactions with Humans and Property
The expanding armadillo population has led to increased interactions with humans, primarily centered around property damage. Their relentless foraging for grubs and insects often leads them to tear up lawns, golf courses, and agricultural fields in search of food. Furthermore, their burrowing behavior can undermine the foundations of decks, sheds, and concrete slabs, creating safety hazards and costly repairs. While they generally avoid confrontation, they can become a nuisance when they take up residence too close to human activity.
Disease Considerations and Safety
It is important for residents to be aware of the potential health risks associated with armadillos. They are the primary reservoir host for leprosy (Mycobacterium leprae) in the United States, although transmission to humans is rare and typically requires close, prolonged contact with infected tissue or fluids. Additionally, like many wild animals, they can carry rabies and various internal parasites. When dealing with armadillos, whether trapped or deceased, it is crucial to avoid direct contact by wearing gloves and practicing safe handling procedures to mitigate any health risks.
