Black walnut

A mature black walnut can tower to 100 feet tall, offering large limbs that serve as ideal roosting trees for wild turkeys and the eastern screech owl. Many species of woodpeckers, swallows, wrens, nuthatches and owls use black walnut cavities, and deer browse its leaves, twigs and buds.
It's coveted prize is a hard-shelled, richly flavored nut that is surprisingly sweet. It takes about 10 years for trees to produce nuts, with best crops beginning at 30 years. The nuts have nearly twice the protein of English walnuts and are a favorite of squirrels, rabbits and other rodents as it takes strong teeth and persistence to gnaw through the extremely hard shells. Woodpeckers also consume the nuts , as do other resourceful birds such as ravens, which fly high in the air with walnuts in their beak, then drop them to the ground to crack the shells.
The feral hog is one of the few larger mammals that readily seek and eat the protein-rich nut . Any bits and pieces that remain after hogs or squirrels have cracked them open become a first-come, first-served buffet for other birds, including wild turkeys.