and 4 young), 2) Spotted Bear River (1 ?, 1 brood of 4 young), and 3) Trail Creek (2?, 2 broods 

 of 3 & 5 young). No Harlequins were observed on Sullivan Creek where they were observed in 

 1992. 



Custer. Gallatin. Kaniksu. and Lolo National Forests . Pair surveys were conducted along 11 1 km 

 of 5 streams during May- June 1993 (Table 1). A minimum of 6 Harlequins (6 males) were seen 

 during surveys on 1 stream, the Boulder River in Gallatin NF (Table 1, Appendix B & C). 

 Additionally we had reports of Harlequins from Rattlesnake Creek (pair in 1990: Joe Ball; pair 

 1989, 1990, 1991). 



Brood surveys were conducted along 127 km of 6 streams during July and August 1993 

 (Table 1). Two diflferent Harlequin Ducks were observed on 1 stream (Table 1, Appendix B & 

 C). The Boulder River had 1 adult female and 1 juvenile present. No Harlequins were observed 

 during surveys of Trout Creek or the North Fork of the Blackfoot River (Lolo NF) where they 

 have been observed in at least one of the past five years. 



Glacier National Park . Brood surveys were conducted along 29 km of the McDonald Creek 

 drainage on 10-1 1 August 1993 (Table 1). A minimum of 22 diflFerent Harlequin Ducks (6?; 6 

 broods of 1, 2, 2, 3, 4, 4) were observed on McDonald Creek (Table 1, Appendbc B & C). Many 

 other surveys were conducted throughout the season by Glacier National Park personnel (Ashley 

 1993). These surveys found up to 18 adult females present in May. 



Breeding Chronology . Breeding was early again this year, probably due to rapid spring runoff in 

 early May. As a result, many females apparently began incubation by 20 May; some males had 



