Maryland Code, Natural Resources § 10-417

(a) A person may not export from the State any game bird or mammal, except wild waterfowl and fur-bearing mammals. However, a licensed hunter may take out as personal baggage in the open season only the prescribed possession limit as set by regulation. The hunter shall produce the hunter's hunting license upon demand of any Natural Resources police officer, any law enforcement officer, or agent of the common carrier. An express company or any common carrier knowingly may not accept any game bird or mammal, except wild waterfowl or fur-bearing mammals, for shipment within or outside the State.

(b) A person desiring to export wild waterfowl from the State shall ship them in the open, tied by head or feet and tagged accordingly, or in a container, slatted so that the birds are visible. A person may not export from the State in 1 week more than the prescribed bag limit of wetland game birds the person kills.

(c) A person acting as a common carrier, or an officer, agent, or employee of a common carrier, may not ship, carry, take, or transport any nongame bird within or outside the State.