Character variation and evolution of sibling species in the Empidonax difficilis-flavescens complex (Aves Tyrannidae)

Character variation and evolution of sibling species in the Empidonax difficilis-flavescens complex (Aves Tyrannidae)

Bibliographic Details
Main Author: Johnson, Ned K. (Author)
Format: Book
Language:English
Published: Berkeley University of California Press [1980]
Series:University of California publications in zoology volume 112.
Subjects:
Pacific-slope flycatcher > Variation.
Pacific-slope flycatcher > Evolution.
Yellowish flycatcher > Variation.
Yellowish flycatcher > Evolution.
Birds > Variation.
Birds > Evolution.