Geographic Variation in the Song of Willow Flycatchers: Differentiation between Empidonax Traillii Adastus and E. T. Extimus

Authors
James A. Sedgwick
Journal
Auk
Volume
118
Issue
2 (April)
Year
2001
Pages
366-379
Section
Articles
File attachments
p00366-p00379.pdf (1.25 MB)

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