How do you bait a snare for armadillos?

You cannot bait a snare for armadillos. Armadillos should be trapped without bait. Any bait you would use for armadillos would likely attract unwanted animals. For example, armadillos love figs, so if you put that by a snare you may instead attract a bear or a raccoon. This is why you cannot bait a snare to trap armadillos.