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 …

Sympatric speciation, the evolution of reproductive isolation without geographic barriers,
remains highly contentious. As a result of new empirical examples and theory, it is now …

Vocalizations of anuran amphibians have received much attention in studies of behavioral
ecology and physiology, but also provide informative characters for identifying and …

Phenotypic plasticity–the ability of an individual organism to alter its features in direct
response to a change in its environment–is ubiquitous. Understanding how and why this …

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 …

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 …

Species are the fundamental units of biology, ecology and conservation, and progress in
these fields is therefore hampered by widespread taxonomic bias and uncertainty …

Genetic data are frequently used to delimit species, where species status is determined on
the basis of an exclusivity criterium, such as reciprocal monophyly. Not only are there …

The origin of species diversity has challenged biologists for over two centuries. Allopatric
speciation, the divergence of species resulting from geographical isolation, is well …

Several important problems in ecology, evolution and conservation biology are affected by
habitat selection in dispersing animals. Experience in the natal habitat has long been …