Why animal communication displays are so complex and how they have evolved are active
foci of research with a long and rich history. Progress towards an evolutionary analysis of …

Variation in communicative complexity has been conceptually and empirically attributed to
social complexity, with animals living in more complex social environments exhibiting more …

Chemical communication is ubiquitous. The identification of conserved structural elements
in visual and acoustic communication is well established, but comparable information on …

Humans frequently perform extravagant and seemingly costly behaviors, such as widely
sharing hunted resources, erecting conspicuous monumental structures, and performing …

Highlights•Testosterone (T) is thought to integrate phenotypes that work well
together.•However, it is not clear how such integration is generated within the organism.•T …

Sexual selection arises from competition among individuals for access to mates, resulting in
the evolution of conspicuous sexually selected traits, especially when inter‐sexual …

Migratory divides, hybrid zones between populations that use different seasonal migration
routes, are hypothesised to contribute to speciation. Specifically, relative to parental species …

The evolution of complex signals has often been explored by testing multiple functional
hypotheses regarding how independent signal components provide selective benefits to …

Despite the well-known effects of sexual selection on phenotypes, links between this
evolutionary process and reproductive isolation, genomic divergence, and speciation have …

Many gregarious species require complex patterns of communication for maintaining
coordinated behaviors, articulated social structure and group cohesion. In mammal species …