Have you ever seen an armadillo? They are mammals that have leathery armour shells?
Oh yeah those invasive things are all over the place where I live!
Sounds about right. All armadillo species inhabit all types of environments all over the Americas.
Where did they originally come from?  I know they're invasive, I just don't know from where?
Armadillo
Armadillos (from Spanish "little armoured one") are New World placental mammals in the order Cingulata. The Chlamyphoridae and Dasypodidae are the only surviving families in the order, which is part of the superorder Xenarthra, along with the anteaters and sloths. Nine extinct genera and 21 extant species of armadillo have been described, some of which are distinguished by the number of bands on their armour. All species are native to the Americas, where they inhabit a variety of different environments. 
Armadillos are characterized by a
all over me. "What? A coyote is a predator and has a right to live." Yeah, they have a right to live, I'm all for that, but they're eating my lambs, folks. I just put it to you, doesn't the lamb have a right to live? "Yeah, but you're going to sell the lamb and they're going to kill the lamb for the money." That's right. If you're going to be in the sheep ranching business