Waterfowl
Of the waterfowl species, those that require tags typically include: most species of geese (including Canada and Brant Geese), snipe, coots, ducks (including Mallard, Ruddy, Harlequin, Scoter, Goldeneye and Long-tailed ducks) and band-tailed pigeon. Prices for these tags will vary depending on species, season and location. Most states will only award a limited number of tags every year, so it's generally recommended to purchase them as early as possible.
Upland Fowl
Common varieties of upland fowl include species of grouse (such as Blue, Ruffed and Sage grouse), pheasant, quail (primarily Valley and Mountain quail), chukar, plover and turkey. Those species of upland fowl which require tags to hunt, however, vary from area to area depending on their population and management status within that area.
Unprotected Fowl
Some fowl are considered unprotected by the U.S. Government-- meaning they require no tags to hunt, and may often be hunted without bag limits, without tags, and in any season. These species include unprotected pest species, such as the Rock Pigeon, European Starling, House Sparrows, grackles and crows. These birds are considered pests because they cause significant damage to native wildlife, property, crops, or spread diseases, and in some states may be subject to a paid bounty.
Considerations
Some birds (particularly several species of waterfowl) are monitored and banded by various government agencies; these bands are small rings, usually of metal, that are placed around one of the bird's legs. If killed, it is usually required by law that a hunter turn these bands in to local wildlife management agencies. Failure to do so is punishable by law in most cases.