Character variation and evolution of sibling species in the Empidonax difficilis-flavescens complex (Aves, Tyrannidae)
By: by Ned K. Johnson.
Series: University of California publications in zoology ; v. 112; University of California publications in zoology ;; v. 112.
Publisher: University of California Press
Published: 1980
Place of publication: Berkeley
Language: eng
Number of pages: 151
Subjects: Pacific-slope flycatcher -- Variation.; Pacific-slope flycatcher -- Evolution.; Yellowish flycatcher -- Variation.; Yellowish flycatcher -- Evolution.; Birds -- Variation.; Birds -- Evolution.
Notes: Bibliography: p. 141-151.