

160 



Key to Plate No. 36 Plate No. 36 



I A) MALLARD-BLACK hybrid, 



(B) MALLARD-BLACK hybrid. 



(C) MALLARD-PINTAIL hybrid. 



(D) MALLARD-PINTAIL hybrid. 



(E) MALLARD-GADWALL hybrid (Brewer's Duck, after Audubon) 



(F) HOODED MERGANSER-AMERICAN GOLDEN-EYE hybrid. 



(G) Albino (Mallard). 



(H) Partial albino (Mallard). 



(See Hybridism, pa^e 43.) 



