Cahn, A. R. 1947. Notes on the birds of the Dutch Harbor area of the Aleutian Islands. Condor 49:78-82. 



Campbell, R. W., N. K. Dawe, I. McTaggart-Cowan, J. M. Cooper, G. W. Kaiser and M. C. McNall. 1990. The birds 

 of British Columbia, Vols. 1 and 2: Non passerines. Royal British Columbia Museum, Victoria, B. C. 5 1 8 and 

 636 pp. 



Carlson, J. C. 1990. Results of harlequin duck {Histrionicus histrionicus) surveys in 1990 on the Flathead National 

 Forest, Montana. Unpublished report. 3 1 pp. 



Cassirer, E. F. 1989. Distribution and status of Harlequin ducks (Histrionicus histrionicus) on the Nez Perce National 

 Forest, Idaho. Report on Challenge Cost Share Project. 13 pp. 



Cassirer, E. F. 1993. Harlequin duck status report 1992: Idaho. Pp. 27-30 in: Cassirer, E. F., et al., (eds.). Status of 

 Harlequin ducks in North America. 83 pp. 



Cassirer, E. F. 1994. Proposed inventory and monitoring protocol for harlequin ducks in northern Idaho. Paper 

 presented at Interagency Rare Animal Workshop, March 2, 1994, Post Falls, Idaho. 14 pp. 



Cassirer, E. F. 1995. Harlequin duck monitoring on the Moyie River and other tributaries to the Kootenai River in 

 northern Idaho subsequent to natural gas pipeline construction. Unpublished report. Idaho Department of Fish 

 and Game, Lewiston, ID. 1 1 pp. 



Cassirer, E. F. and C. R. Groves. 1989. Breeding ecology of harlequin ducks (Histrionicus histrionicus) on the Kaniksu 

 National Forest, Idaho. Report on Challenge Cost Share Project. 48 pp. 



Cassirer, E. F. and C. R. Groves. 1990. A summary of harlequin duck sightings in Idaho, 1989. Unpubl. rep. Idaho Dep. 

 of Fish and Game, Boise. 1 1 pp. 



Cassirer, E. F. and C. R. Groves. 1990. Distribution, habitat use and status of harlequin ducks (Histrionicus histrionicus) 

 in northern Idaho, 1990. Idaho Dept. of Fish and Game, Nongame and Endang. Wildl. 54 pp. 



Cassirer, E. F. and C. R. Groves. 1991. Harlequin duck ecology in Idaho: 1987-1990. Idaho Dep. of Fish and Game, 

 Boise. 93 pp. 



Cassirer, E. F. and C. R. Groves. 1992. Ecology of Harlequin Ducks in northern Idaho; progress report 1991. Idaho 

 Dept. Fish and Game, Boise, ID. 74 pp. 



Cassirer, E. F. and C. R. Groves. 1994. Breeding ecology of Harlequin ducks in Idaho. P. 3 in: Proc. 2nd ann. Harlequin 

 duck symposium, March 13-15, 1994. Harlequin Duck Working Group. 22 pp. plus appendices. 



Cassirer, E. F. and C. R. Groves. 1994. Ecology of harlequin ducks (Histrionicus histrionicus) in Northern Idaho. Study 

 No. 4202-1-7-2. Idaho Dept. of Fish and Game. 51 pp. 



Cassirer, E. F. and G. Schirato. 1990. Harlequin duck boat surveys, northwest Washington coast, 9/24-9/29/90. 

 Washington Dept. of Wildl. 1 p. 



Cassirer, E. F., G. Schirato, F. Sharpe, C. R. Groves, and R. N. Anderson. 1993. Cavity nesting by harlequin ducks in 

 the Pacific Northwest. Wilson Bull. 105:691-694. 



Cassirer, E. F., J. D. Reichel, R. L. Wallen, and E. Atkinson. 1996. Harlequin Duck (Histrionicus histrionicus) 

 conservation assessment and strategy for the U.S. Rocky Mountains. Draft report. 



31 



