The doves that visit our yard are actually Mourning doves (Zenaida macroura). In Jamaica we also call them ground doves.
I always thought these doves were called Mourning doves because of their sad mourn when one of them loses its mate. I thought they mated for life, but this is not so.
The Mourning dove will mate with one partner until death, after which the surviving dove will find a new mate. Their sad-sounding coo is actually their call when they begin nesting and raising their young.