cies should be considered highly vulnerable because of its preference for coast- 

 al waters during winter. However, the scarcity of the species in the southeast 

 implies that no damage to the population would be done by oiling incidents in 

 that area. 



BIBLIOGRAPHY 



1979 



Kaufman, K. and J. Witzeman. 1979. A Harlequin Duck, reaches Sonora, Mexico. 

 Continental Birdlife 1: 16-17. 



1978 



Lewis, B. and L. Lewis. 1978. Harlequin Duck on Bull's Island, S.C. Chat 42: 

 81-82. 



1977 



Davis, R. 1977. Harlequin Duck at Carolina Beach, N.C. Chat 41: 48. 



1976 



Parkes, K. C. and C. H. Nelson. 1976. A definite Colorado breeding record for 

 the Harlequin Duck. Auk 93: 846-847. 



1973 



McNicholl, M. K. 1973. Records of the Harlequin Duck in Manitoba and adjacent 

 regions. Blue Jay 31: 150-152. 



1972 



Bengston, S.-A. 1972. Breeding ecology of the Harlequin Duck Histrionicus 

 histrionicus (L.) in Iceland. Ornis Scand. 3: 1-19. 



1971 



Bengtson, S.-A. 1971. Habitat selection of duck broods in Lake Myvatn area, 

 north-east Iceland. Ornis Scand. 2: 17-26. 



Bengtson, S.-A. and S. Ulfstrand. 1971. Food resources and breeding frequency 

 of the Harlequin Duck Histrionicus histrionicus in Iceland. Oikos 22: 

 235-239. 



Gudmundsson, F. 1971. Straumendur ( Histrionicus histrionicus ) a Islandi. 



Fyrri hluti. [The Harlequin Duck ( Histrionicus histrionicus ) in Iceland.] 

 Natturufraedingurinn 41: 1-28. [In Icelandic with English summary.] 



336 



