![](https://www.popsci.com/wp-content/uploads/2024/07/swimming-armadillo.jpg)
‘Chaos is the norm now:’ The blurry line between invasive and range-expanding species
Armadillos are relatively recent arrivals in the United States. The scaly species crossed the Rio Grande from Mexico northward into Texas sometime in the mid-1800s. It’s not certain how, exactly, the animals made it to the U.S. and established themselves. …