Bui. 1268, U. S. Dept. of Agriculture 



Plate I 



Fig. I. — Spring-pole Trap 



Duck station at Cuivre Island, Mo., operated by L..V. Walton 



Fig. 2. — Automatic Pen-trap 



Duck station maintained at the Sanganois Club, Browning, ill., by the writer. Tho trap 

 contained 93 mallards, pintails, and black ducks when this picture was taken 



