Ruddy Ground-Dove

JP is right, it's a Ground-Dove. Mourning and Spotted Doves are larger with different patterning.

I also found this (in portuguese), and the sound is very, very similar:
http://www.wikiaves.com.br/rolinha-roxa#...
Columbina talpacoti
But indeed, is very similar to the Zenaida macroura, Backyardphotographer99.

i'm not sure, sanmiggums. it could be a mourning dove.

I think it is Columbina genus.
http://en.wikipedia.org/wiki/Columbina_(...)