LITERATURE CITED 



Bellrose, F.C. 1976. Ducks, geese and swans of North America. 

 Stackpole Books, Harrisburg, PA. 54 pp. 



Bengtson, S. A. 1966. Field studies on the harlequin duck in 

 Iceland. Wildfowl Trust Ann. RPT. 17:79-94. 



Bengtson, S. A. 1972. Breeding ecology of the harlequin duck, 



Histrionicus histrionicus . in Iceland. Ornis. Scand. 3:1-19. 



Cassirer, E. F. 1989. Distribution and status of harlequin ducks 

 ( Histrionicus histrionicus ) on the Nez Perce National 

 Forest, Idaho. 



Dzinbal, K. A. 1982. Ecology of harlequin ducks in Prince 



William Sound, Alaska during summer. M.S. Thesis, Oregon 

 State Univ., Corvalis, OR. 89pp. 



Gallop, J. B. and W. F. Marshall. 1954. A guide to aging duck 



broods in the field. Mississippi Flyway Council, Technical 

 Section Report. 9pp. 



Kerr, R. 1989. Field survey summary report of the harlequin duck 

 ( Histrionicus histrionicus ) on the Kootenai National Forest, 

 Montana. Unpublished report. 10pp. 



Kuchel, C. R. 1977. Some aspects of the behavior and ecology of 

 harlequin ducks breeding in Glacier National Park. M.S. 

 Thesis, Univ. of Montana, Missoula, MT. 163pp. 



Miller, V. E. 1988. Harlequin ducks ( Histrionicus histrionicus ) 

 1988 results of field surveys in west-central Montana. 

 Unpublished Report. 13pp. 



Miller, V. E. 1989. 1989 field survey report, harlequin duck 

 ( Histrionicus histrionicus ) , lower Clark Fork River 

 drainage, west-central Montana. Unpublished Report. 47pp. 



Reel S., L. Schassberger, and W. Ruediger. 1989. Caring for our 

 natural community: Region 1 - threatened, endangered and 

 sensitive species program. USDA Forest Service, Northern 

 Region, Missoula, MT. 3 09pp. 



Robins C. R. and R. W. Crawford. 1954. A short accurate method 

 for estimating the volume of stream flow. J. Wild. Manage. 

 18:366-369. 



Wallen, R. L. 1987. Habitat utilization by harlequin ducks in 



Grand Teton National Park. M.S. Thesis, Montana State Univ., 

 Bozeman, MT. 67pp. 



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