SHORT COMMUNICATIONS 
807 
when they departed and night-time departures 
were almost nonexistent within the subset of birds 
monitored each evening. Departure just prior to 
the onset of civil sunset by one Sage Sparrow was 
consistent with migration-timing studies of other 
nocturnally-migrating species (Cochran 1987). 
ACKNOWLEDGMENTS 
We [hank Matthias Leu for guidance during the course of 
our project: Caroline Kim. M. C. McCarthy, and K. J. van 
Guns! for field assistance: Bruce Schoeberl for instruction 
on harness construction and fitting; Gifford Gillette and 
Idaho Fish and Game for telemetry advice: and USGS Fort 
Collins Science Center and Boise State University's Raptor 
Research Center for use of telemetry equipment. Reviews 
hy J D. Carlisle. D. S. Dobkin. K. L. Paxton, and an 
anonymous reviewer improved this paper. Our study was 
funAai fay the USGS Forest and Rangeland Ecosystem 
Science Center. Any use of trade, product, or firm names is 
for descriptive purposes only and does not imply endorse¬ 
ment by the United States government. 
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