Bui. 793, U. S. Dept. of Agriculture. 



Plate 1 1 . 



Fig. "..—Stomach of Mallard that Died from Lead Poisoning. 



Abnormal distension of lower oesophagus and proventriculus with food produces a mass larger 



than the gizzard. 



Fig. 2.— Mallards WITH Lead Poisoning. 



The breast is depressed and the tail droops when the bird is standing. In health the carriage 



is more erect. 



