Glacial cycles have played a dominant role in shaping the genetic structure and distribution
of biota in northwestern North America. The two major ice age refugia of Beringia and the …

Modern attempts to produce biogeographic maps focus on the distribution of species, and
the maps are typically drawn without phylogenetic considerations. Here, we generate a …

In this review I summarize the history of the subspecies concept and the major debates and
issues surrounding its use, with an emphasis on ornithology, in which the concept …

Se presenta un análisis del listado actualizado de las aves de México, con enfoques
taxonómicos actuales y abarcando todas aquellas especies que tengan registros recientes …

Several studies have observed that taxa below the level of species can vary in the degree to
which they differ from one another in the environmental space they occupy. These patterns …

Detailed evaluations of genomic variation between sister species often reveal distinct
chromosomal regions of high relative differentiation (ie,“islands of differentiation” in FST), but …

The birds in the family Parulidae—commonly termed the New World warblers or wood-
warblers—are a classic model radiation for studies of ecological and behavioral …

Abstract Background The Palearctic region supports relatively few avian species, yet recent
molecular studies have revealed that cryptic lineages likely still persist unrecognized. A …

Discordance between mitochondrial and nuclear DNA has been noted in many systems.
Asymmetric introgression of mitochondria is a common cause of such discordances …

Species delimitation requires a broad assessment of population-level variation using
multiple lines of evidence, a process known as integrative taxonomy. More specifically …