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A further examination of wing and tail formulae in Empidonax and Contopus flycatchers

Authors:
P. Pyle
Journal:
Era of Allan Phillips: A Festschrift
Year:
1997
Online Text:

Abstract

Useful new information on identifying and sexing specimens of Empidonax and Contopus flycatchers, two of the most critically examined genera of North American birds, is presented in a format most useful for in-hand determinations.

File attachments
Pyle.pdf (370.37 KB)

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