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



Plate I. 







Fig. I.— Mallard with Lead Poisoning. 



The carpal joint of the wing is affected, simulating "wrist drop," and the bird has difficulty 



in walking. 



, /-,' '- ^ f Nt ■-' 



^'"^•^S. 



Fig. 2.— Pintail with Lead Poisoning. 



Paralysis of the legs renders the bird unable to stand. 



