Hybridization, or interbreeding between different taxa, was traditionally considered to be
rare and to have a largely detrimental impact on biodiversity, sometimes leading to the …

Gene expression has a key role in reproductive isolation, and studies of hybrid gene
expression have identified mechanisms causing hybrid sterility. Here, we review the …

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 …

Ecological isolation is increasingly thought to play an important role in speciation, especially
for the origin and reproductive isolation of homoploid hybrid species. However, the extent to …

Ecological and evolutionary processes underlying spatial variation in signals involved in
mate recognition and reproductive isolation are crucial to understanding the causes of …

Homoploid hybrid speciation is challenging to document because hybridization can lead to
outcomes other than speciation. Thus, some authors have argued that establishment of …

Interspecific hybridization can lead to myriad outcomes, including transgressive phenotypes
in which the hybrids are more fit than either parent species. Such hybrids may display …

The closely related Black-headed Bunting (Emberiza melanocephala, a western Palearctic
lineage) and Red-headed Bunting (Emberiza bruniceps, an eastern Palearctic lineage) …

Ectotherms are expected to be particularly vulnerable to climate change driven increases in
temperature. Understanding how populations adapt to novel thermal environments will be …