Species‐level taxonomy derives from empirical sources (data and techniques) that assess
the existence of spatiotemporal evolutionary lineages via various species “concepts.” These …

The increased capacity of DNA sequencing has significantly advanced our understanding of
the phylogeny of birds and the proximate and ultimate mechanisms molding their genomic …

Speciation is the process by which barriers to gene flow evolve between populations.
Although we now know that speciation is largely driven by natural selection, knowledge of …

The significance of prezygotic isolation for speciation has been recognized at least since the
Modern Synthesis. However, fundamental questions remain. For example, how are genetic …

Recent adaptive radiations are models for investigating mechanisms contributing to the
evolution of biodiversity. An unresolved question is the relative importance of new mutations …

The genetic architecture of a phenotype can have considerable effects on the evolution of a
trait or species. Characterizing genetic architecture provides insight into the complexity of a …

Hybridization is widely recognized as promoting both species and phenotypic diversity.
However, its role in mammalian evolution is rarely examined. We report historical …

Detecting signals of selection from genomic data is a central problem in population genetics.
Coupling the rich information in the ancestral recombination graph (ARG) with a powerful …

Insular organisms often evolve predictable phenotypes, like flightlessness, extreme body
sizes, or increased melanin deposition. The evolutionary forces and molecular targets …

Organismal adaptations are the hallmark of natural selection. Studies of adaptations in avian
systems have been central to key conceptual and empirical advances in the field of …