Hybridization between species is commonplace in plants, but is often seen as unnatural and
unusual in animals. Here, I survey studies of natural interspecific hybridization in plants and …

Explaining the evolution of species geographical ranges is fundamental to understanding
how biodiversity is distributed and maintained. The solution to this classic problem in …

Charles Darwin's experiences in the Galápagos Islands in 1835 helped to guide his
thoughts toward a revolutionary theory: that species were not fixed but diversified from their …

Mating with another species (hybridization) is often maladaptive. Consequently, females
typically avoid heterospecifics as mates. Contrary to these expectations, female spadefoot …

Theoretical models suggest that geographic overlap with different heterospecific
assemblages can promote divergence of mate recognition systems among conspecific …

This study addresses the causes and evolutionary consequences of introgressive
hybridization in the sympatric species of Darwin's ground finches (Geospiza) on the small …

Reinforcement, the evolution of prezygotic reproductive barriers by natural selection in
response to maladaptive hybridization, is one of the most debated processes in speciation …

Abstract The Western Lyresnake (Trimorphodon biscutatus) is a widespread, polytypic taxon
inhabiting arid regions from the warm deserts of the southwestern United States southward …

Hybrid zones, ie, geographic areas where diverging lineages meet, hybridize and eventually
mix their genomes, offer opportunities to understand the mechanisms behind reproductive …

Reinforcement occurs when natural selection strengthens behavioral discrimination to
prevent costly interspecies matings, such as when matings produce sterile hybrids. This …