Mourning doves are the most-hunted migratory game bird in North America — slim, fast, gray-brown birds with long pointed tails and a soft, mournful three-note coo that gave them the name. They're the September opener for a huge swath of the country, the bird that ends most American hunters' summer and begins their fall.
The species hunted as 'dove' is overwhelmingly the mourning dove (Zenaida macroura), but in much of the southern US and the Southwest, two other doves are now significant components of the harvest. White-winged doves (Zenaida asiatica) have expanded their breeding range dramatically since the mid-20th century and are now common across the southern tier from California to Florida. Eurasian collared-doves (Streptopelia decaocto) are an invasive Old-World species that arrived in Florida in the 1980s and have since spread coast-to-coast; many states do not count them against the daily bag limit because of their non-native status, and some do not classify them as game birds at all.
Doves are a sit-and-wait hunt — sunflower fields, harvested grain, gravel roads, stock-tank water sources in dry country. They fly fast, twist hard, and humble experienced wingshooters every September. Shot-to-bird ratios get talked about at length.