56 BIRDS OF SOUTH DAKOTA 
belly light; back barred with gray and white. Female like No. 
147, but feathers at base of bill white. 
149. Lesser Scaurp Duck (Marila affinis.) 
The plumage of both male and female is similar to No. 
148, but the bird is smaller. It rarely nests in South Dakota but 
is common in migration. Both of the Scaups are lovers of deep 
water and common in the Great Lakes region. 
150. Rinc-NECKED Duck (Marila collaris.) 
This Duck is smaller than No. 149. Head black; chin 
white; brown neck ring, whence its name; back and tail black; 
under parts light. Female similar but more rusty on breast and 
back. A rare breeder in the northeastern part of the State. 
151. GoLpEN-EYE (Clangula clangula americana.) 
About the size of the Redhead and common in the State 
some seasons as a migrant. 
Male: green head slightly crested with a round white 
patch on cheek; breast and belly white. Female: head brown; 
throat white; breast and back gray. Their summer home is 
well within the Arctic regions. 
153. BuFFLE-HEAD (Charitonetta albeola.) 
A rather small Duck. Green head slightly crested; white 
patch extending back from eyes; neck, breast and belly white or 
grayish; back black. Female: brown head and neck with white 
on sides of head; throat and breast grayish brown. Probably 
seen only in migration. 
154. Onp-seuaw (Harelda hyemalis.) 
Very rare; seen only in migration. There are only two 
specimens in the University Museum. 
Central tail feathers of both sexes very long and black. 
Male in summer: black, with some rusty on back; white patch 
around eye. In winter: head white, with black patch on sides 
of neck; breast white; black crescent over shoulders. Female 
in summer: head and upper parts mostly dusky, with whitish 
patch back of eye. In winter: cheeks, neck and under parts 
white; breast dusky. Breeds in the Arctic regions. 
