Studies on polymorphisms have been foundational to our understanding of evolution. The
presence of different phenotypic morphs is sometimes considered a precursor to speciation …

Reptiles use pterin and carotenoid pigments to produce yellow, orange, and red colors.
These conspicuous colors serve a diversity of signaling functions, but their molecular basis …

Synopsis “Sex” is often used to describe a suite of phenotypic and genotypic traits of an
organism related to reproduction. However, these traits—gamete type, chromosomal …

In this contribution, the aspects of reptile and amphibian speciation that emerged from
research performed over the past decade are reviewed. First, this study assesses how …

Highlights•We examined whether conspicuous coloration predicts male quality in Podarcis
muralis.•Hue of ultraviolet-blue patches is a good predictor of fighting ability.•UV chroma of …

Colour signals play a key role in regulating the intensity and outcome of animal contests.
Males of the common wall lizard (Podarcis muralis) show conspicuous ventrolateral …

The maintenance of polymorphisms often depends on multiple selective forces, but less is
known on the role of stochastic or historical processes in maintaining variation. The common …

Space is a limited resource in which many animals need to perform basic functions such as
feeding and reproducing. Competition over access to space can induce a variety of …

Color polymorphism defies evolutionary expectations as striking phenotypic variation is
maintained within a single species. Color and other traits mediate social interactions, and …

Visual signals are often under conflicting selection to be hidden from predators while being
conspicuous to mates and rivals. Here, we investigated whether 3 different island …