From the MDC:

To pursue, take, possess, and transport ducks, coots, and geese in Missouri, except during the Conservation Order, you must possess and carry the following, unless exempt:

1) a Missouri permit to hunt small game is required of:

• Missouri residents age 16 through 64
• Nonresidents age 16 and older

An annual permit is available to residents for $10 and to nonresidents for $80 from any permit vendor. A daily permit is also available to nonresidents from any permit vendor for $11 per day.

Exemption: Missouri resident landowners hunting on their own land do not need a Missouri small game hunting permit, but the Migratory Bird Hunting Permit and Duck Stamp are required (see below).

2) Missouri Migratory Bird Hunting Permit is required of:

• Residents and nonresidents age 16 and over.

This permit is available for $6 from any permit vendor. Purchase of this permit satisfies requirements for Migratory Game Bird Harvest Registration.

3) Federal Migratory Bird Hunting and Conservation Stamp is required of: Residents and nonresidents age 16 and over. To be valid, the federal Migratory Bird Hunting and Conservation Stamp (duck stamp) must be signed in ink across the face.

Stamps are available for $25 at some U.S. Post Offices, MDC regional offices, nature centers, and visitor’s centers, but not at permit vendors or waterfowl hunting conservation areas.

Duck stamps are also available online at the Buy e-Permits link below or at Missouri permit vendors. The electronic duck stamp, or e-Stamp, allows customers to purchase the Federal Duck Stamp online and use it immediately. The e-Stamp costs $28.50 and is valid for 45 days from the date of purchase. Within that time, a physical duck stamp will be mailed to the customer. After 45 days, the customer must carry their Federal Duck Stamp while hunting. Retail vendors will still be able to process e-Stamp transactions for hunters.

HUNTING METHODS

Firearms

Only shotguns, 10 gauge or smaller, are allowed for hunting migratory game birds.

If a shotgun can hold more than three shells, it must be plugged with a one-piece filler that cannot be removed without disassembling the gun.

Concealment devices

You can't use a sink box or anything else that conceals you below the surface of the water.

Motorized transportation

Hunting from a motor vehicle, including aircraft, is not allowed. Paraplegics and persons missing one or both legs are exempted from this regulation.

Motorized vehicles, including aircraft, or motor boats or sailboats may not be used to round up migratory birds.

You can't hunt from a motorboat or sailboat unless the motor is off or sails furled.

Decoys and calls

Live decoys are prohibited. All tame or captive ducks and geese must be removed 10 days prior to hunting. All tame or captive ducks and geese must be kept where migratory waterfowl cannot see them and their calls are quieted.

Recorded or amplified bird calls or amplified imitations of bird calls are not allowed.

Baiting

You can't bait your hunting area. All bait must be removed 10 days prior to hunting.

Hunting over freshly planted food plots is prohibited.

POSSESSION AND TRANSPORTATION

Wanton Waste

All hunters must make a reasonable effort to retrieve any bird killed or crippled while hunting. The bird must be in the hunter's custody until it is brought back to the hunter's lodging or a taxidermist.

Opening Day Of A Season

On the opening day of the season, no person shall possess any freshly killed migratory game birds in excess of the daily bag limit.

Field Possession Limit

No person shall have more than the daily bag limit of migratory game birds, tagged or not tagged, at or between the place where taken and either (a) one’s automobile or principal means of land transportation; or (b) one’s personal abode or temporary or transient place of lodging; or (c) a migratory bird preservation facility; or (d) a post office; or (e) a common carrier facility.

Tagging Requirements

All hunters must tag migratory birds before giving the bird to another person for processing, storage, or for taxidermy. The tag will have the hunter's address, number and species of birds, and the date the birds were killed, and be signed by the hunter.

All birds must be tagged before the hunter gives the birds as a gift, or are transported by another person. If the birds are mailed or shipped, the box must have the tagging information.

Species Identification Requirement

All waterfowl must have the head or one fully-feathered wing attached while the bird is in transit to the hunter's home or taxidermist.