Here is a card I found at zazzle that will show you what an armadillo looks like. I would share with you a photo but I did not get a good capture.
Here is a video that will show you how to set up a trap for an armadillo, using the boards. Know that my brother and his buddies did herd the pest into the trapping area. He told me that the armadillo tends to go where it wants.
Other pest control posts by Sgolis