sightings to speculative dates of migration. Ducks appear to 

 migrate to their breeding grounds sometime in April. The last 

 male we saw was on May 2 3 indicating to us that the male 

 migration back to the coast probably occurred in mid to late May. 

 Our last sighting of an adult female was on August 15 and of 

 juveniles was August 21. We estimate migration times to begin 

 mid to late August. The hens may depart earlier than the broods. 



We found harlequins on streams ranging from 5 m (16 ft) to 

 over 30 m (100 ft) wide and with flows of 24 cfs to >4000 cfs. 

 Stream gradients were between 1.8 % and 2.8% (Table 3). We found 

 the harlequins in an assortment of habitats, such as flat, 

 graveled, willow-cottonwood flood plains; narrow bed rock 

 canyons; and streams with adjacent mature forests. All the 

 streams where we found broods had beaver activity, stream 

 braiding or distinctive side channels. Stream side vegetation in 

 these areas tended to be moderate to dense. 



We gathered historical and recent sightings, trying to 

 confirm sightings when possible (Table 4) . 



Discussion of Creeks Where We Found Harlequin Ducks 

 Big Creek - Rexford District (KNF) 



On August 21 we located a lone juvenile 9 miles up Big 

 Creek, technically on the South Fork of Big Creek. The bird was 

 initially sighted by Forest Service personnel assisting in the 

 survey and then by us several hours later approximately 1 mile 

 from the first observation. We are assuming we both saw the same 



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