640 
THE WILSON JOURNAL OF ORNITHOLOGY • Vol 124. No. 3. September 2012 
(Goodrich and Smith 2008). It would be fruitful to 
involve and train local residents in the phenome¬ 
non of observing long-distance migrating raptors 
as Concepcion altords an exceptional opportunity 
to study and appreciate raptor migration in South 
America. 
ACKNOWLEDGMENTS 
I am grateful to Cristian Olivo for help with logistics of this 
work. I thank the Herzog family. Sebastian. Carol, and Nanuq 
lor hosting me at their home and also for looking after me 
when I was sick. I also thank Ramona Hoffman, Elizabet and 
Toto for hosting tnc at their house during the study. J learned 
the techniques to study raptor migration as an International 
Intern at Hawk Mountain Sanctuary. Travis Rosenberry from 
the Peregrine Fund Library sent me multiple papers about 
raptor migration. Also, it mi fomilia par apoyanne en exie 
proyecto. I thank Laurie J. Goodrich and Juan I. (Naeho) 
Arcta for many helpful comments on an early draft of this 
manuscript. I thank Clait E. Braun, Mark Martel], and an 
anonymous referee for their reviews and valuable comments 
on the manuscript. 1 his is Hawk Mountain Sanctuary 
contribution to conservation science number 215. 
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The Wilson Journal of Ornithology 124(3):640-643, 2012 
Simultaneous Multiple Nests ot Calliope Hummingbird and 
Rufous Hummingbird 
Ned Batchelder , 1 Gigi Batchelder , 1 Dale A. Livezey , 2 and Jeffrey S. Marks 3 ' 4 
' 193 South 330 West, Ivins, UT 84738, USA. 
12707 Street East. Helena. MT 59601, USA. 
'4241 SE Licbc Street, Portland. OR 97206, USA. 
‘Corresponding author; e-mail: jeffl7_marks@ni.sn.com 
ABSTRACT.—We report the first cases of simulta¬ 
neous double brooding known for Calliope Humming¬ 
bird (Stellula calliope) and Rufous Hummingbird 
(Selasphorus rufus) from observations of two females 
