Unlike the annual bi-directional movements of over 200 bird species within the PalaearcticâAfrotropical region, irregular movements such as irruptive migration with a low degree of philopatry are re
<b>Abstract</b><br/>Ongoing evolution of polyandry, and consequent extra-pair reproduction in socially monogamous systems, is hypothesised to be facilitated by indirect selection ste
The level of expression of sexually selected traits is generally determined by genes, environment and their interaction. In species that use multiple sexual signals which may be costly to produce, inv
Alternative reproductive tactics are discrete, intrasexual differences in reproductive behavior within a population. In some cases, these complex phenotypes are determined by autosomal supergenes or
