Add Yahoo as a preferred source to see more of our stories on Google. mourning dove perched on a tree branch - Hayleigh Haid/Getty Images Mourning doves have a unique mix of brown and gray colors with ...

Last year we heard the first hollow, mournful cooing sound of the mourning dove on Feb. 25. Such wintering-over birds are usually first heard by the third week of February, as an early sign of spring.