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Article
Andrew C. Rush, Auteur ; Richard J. Cannings, Auteur ; Darren E. Irwin, AuteurContact zones between recently diverged taxa offer unique opportunities to test whether the forms are reproductively isolated and therefore distinct species. The Pacific-slope flycatcher Empidonax difficilis and Cordilleran flycatcher Empidonax [...]
Article
Sampath S. Seneviratne, Auteur ; David P. L. Toews, Auteur ; Alan Brelsford, Auteur ; Darren E. Irwin, AuteurHybridization has presented a challenge for taxonomists and conservation biologists, since hybridizing forms could be stable evolutionary entities or ephemeral forms that are blending together. However, hybrid zones also provide a unique opportu[...]
Article
Darren E. Irwin, Auteur ; Alan Brelsford, Auteur ; David P. L. Toews, Auteur ; Christie MacDonald, Auteur ; Mark Phinney, AuteurThere are many pairs of related western and eastern avian taxa in North America, and for many of these, little is known about their interactions in sympatry. One example is provided by MacGillivray's warblers Oporornis tolmiei and mourning warbl[...]
Article
David P. L. Toews, Auteur ; Alan Brelsford, Auteur ; Darren E. Irwin, AuteurHybrid zones between species provide natural systems for the study of processes involved in divergence, reproductive isolation and speciation. Townsend's Dendroica townsendi and black-throated green D. virens warblers are phenotypically and gene[...]
Article
Sampath S. Seneviratne, Auteur ; Peter Davidson, Auteur ; Kathy Martin, Auteur ; Darren E. Irwin, AuteurThree species of closely related woodpeckers (sapsuckers; Sphyrapicus) hybridize where they come into contact, presenting a rare 'lambda-shape' meeting of hybrid zones. Two of the three arms of this hybrid zone are located on either side of the [...]
