While no bait is required when trapping snakes as they prefer live prey, you can use some common food for the copperhead snakes like eggs, mice, or crickets in the Tomahawk Snake Trap with Extension Wings - Model 460XL to lure them in as long as they can be contained inside the station.
Since snakes only eat live prey there really isn’t a bait to place in the Tomahawk Snake Trap with Extension Wings - Model 460XL. It is best to place in areas they travel and where you suspect there is activity.