Iowa Code § 481A.23: Transportation for sale prohibited.

It shall be unlawful for any person, firm, or corporation, except as otherwise provided, to offer for transportation or to transport by common carrier or vehicle of any kind, to any place within or without the state, for the purposes of sale, any of the fish, game, animals, or birds taken, caught, or killed within the state, or to peddle any of such fish, game, animals, or birds.