Here is a Bitternut hickory tree that is growing in the open in a park. I live near here and I know for at least 17 years this tree has grown in the open. So this tree has an opportunity to be a wolf tree. A wolf tree has a short bole and wide branches. They grow this way because of no competition. But this tree has not taken advantage of this freedom of growth.
There is some dark growth on the twigs of this hickory. You can also see the terminal bud which ID's it as a bitternut hickory. Long fuzzy yellow/orange bug.
Here is a photo of the hickory nut. Notice the ridges on the end of the nut. This ID's it as Bitternut hickory.