Table 2. Number of occurrences (streams) where harlequin ducks have been observed in the 



Rocky Mountains. 



Area 



Breeding 



Probable 

 breeding 



Breeding status 

 unknown 



Northern Columbia Basin Northern 

 Idaho/Northeastern Washington 1 



Northern Columbia Basin 



Northwestern Montana and 

 Rocky Mountain Front 2 



Intermountain 



Southwestern Montana 



Intermountain 



Southern Idaho 3 



Intermountain 



Wyoming 4 



14 (23) 

 24(47) 



1(17) 



0(5) 

 1(17) 



HD 



HD 



1(5) 



16(16) 

 26(27) 



6(9) 

 8(8) 

 21 (21) 



Total 



47 (89) 



10 (29) 



11 (81) 



One of these occurrences originates in northeastern Washington and flows into northern Idaho. 



One of these occurrences originates in Idaho and flows into Montana, one originates in British Columbia 



and flows into Montana, one originates in Montana and flows into Alberta, and one originates in 



Montana and flows into British Columbia. 



One of these occurrences originates in northwestern Wyoming and flows into southern Idaho. 



One of these occurrences originates in northwestern Wyoming and flows into southwestern Montana. 



The majority of known and probable harlequin duck breeding streams in the Rocky Mountains 

 occur on federal lands (Table 3). In Idaho, 89% of known and probable breeding occurrences and 

 93% (28 of 30) of known and probable breeding streams are on lands managed by the U.S. Forest 

 Service, although at least 6 of these streams cross some private or corporate timber land. The two 

 breeding occurrences not managed by the Forest Service are in watersheds managed primarily by the 

 Idaho Department of Lands. In Montana, 76% (25 of 33) known and probable breeding occurrences 

 are also primarily managed by the U.S. Forest Service, 5 (15%) are in Glacier National Park, and one 

 each (3%) are on state, private, and mixed ownership (Glacier, Private, and Forest Service). At least 

 13 of these occurrences cross some private or corporate timber lands in stream reaches harlequins are 

 known to use, and an additional 8 in stream reaches harlequins may use. The large number of 

 occurrences in Montana which cross private lands show the importance of involving private landowners 

 in management decisions; many occurrences could be jeopardized by changes in 



