yup....I'd have to say it's a mourning dove
I don't know if it is "normal"...but the mourning doves around here don't build their own nests (like pigeons, I believe that doves are crummy nest builders....
The ones we have nesting around here lay their eggs in nests left over from last year from other birds...robins and grackles mostly here.
And Julie...sounds like what you have is a ringneck. Probably one that got away from someone? Although, hubby was once told by a pigeon guy that he kept ringnecks in his loft all winter...then in the spring, would open the doors...they'd all go out, nest in the trees around his place. Then, in the fall, when the nights got shorter and colder, they'd all come back into his loft! Don't know how true this is, but I know the guy, and he isn't one to make up stories!