Speciation, the evolution of reproductive isolation among populations, is continuous,
complex, and involves multiple, interacting barriers. Until it is complete, the effects of this …

The origin, distribution, and function of biological diversity are fundamental themes of
ecology and evolutionary biology. Research on birds has played a major role in the history …

When related taxa hybridize extensively, their genomes may become increasingly
homogenized over time. This mixing via hybridization creates conservation challenges when …

Behavioral variation abounds in nature. This variation is important for adaptation and
speciation, but its molecular basis remains elusive. Here, we use a hybrid zone between two …

Phylogeography, and its extensions into comparative phylogeography, have their roots in
the layering of gene trees across geography, a paradigm that was greatly facilitated by the …

Abstract Theory and empirical patterns suggest a disproportionate role for sex chromosomes
in evolution and speciation. Focusing on ZW sex determination (females ZW, males ZZ; the …

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

Details on the genetics of behavioral and quantitative phenotypes remain limited to a few
organisms. Such information is central to understanding both adaptation and speciation, as …

Insects are capable of extraordinary feats of long‐distance movement that have profound
impacts on the function of terrestrial ecosystems. The ability to undertake these movements …

Migration is a complex behavioural adaptation for survival that has evolved across the
animal kingdom from invertebrates to mammals. In some taxa, closely related migratory …