Whether or not Adam had anything to do with living creatures such as the dinosaurs, teradactyls and the like, I mean, scripture describes how it is he named all the animals.
We were according to scripture the last of God's creation. Where did they go? Why they created at all? Were they possibly used to clear away the overgrowth of vegetation in order to prepare ahead of time the eventual coming of man before they were alledgedly destroyed thru some cataclysmic occurence?