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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