A tribute to the career of Ned K. Johnson : enduring standards through changing times / J.V. Remsen, Jr. and Carla Cicero -- Molecular advances in the study of geographic variation and speciation in birds / Allan J. Baker -- Vainly beating the air : species-concept debates need not impede progress in science or conservation / Kevin Winker ... [et al.] -- Named subspecies and their significance in contemporary ornithology / James D. Rising -- Distributional dynamics of invasion and hybridization by Strix spp. in western North America / William B. Monahan and Robert J. Hijmans -- Divergence between subspecies groups of Swainson's thrush (Catharus ustulatus ustulatus and C. u. swainsoni) / Kristen Ruegg -- Narrow contact of desert sage sparrows (Amphispiza belli nevadensis and A. b. canescens) in Owens Valley, eastern California : evidence from mitochondrial DNA, morphology, and GIS-based niche models / Carla Cicero and Ned K. Johnson -- Statistical assessment of congruence among phylogeographic histories of three avian species in the California Floristic Province / Kevin J. Burns ... [et al.] -- The "walking eagle" Wetmoregyps daggetti Miller : a scaled-up version of the savanna hawk (Buteogallus meridionalis) / |