Hey, Take this as an informed guess; Ash, and Juniper (erc and rocky mountain juniper), are the most widely spread bow worthy trees. Other woods available in more localized areas; american elm, bur oak, ironwood, red maple, chokecherry, mulberry, birch. Osage is widespread now, but was introduced by european settlers. If you're really serious about native made crafts, you might try contacting the Omaha reservations directly. Ron