In so-called ethorobotics and robot-supported social cognitive neurosciences, robots are
used as scientific tools to study animal behavior and cognition. Building on previous …

Brilliantly-colored birds are a model system for research into evolution and sexual selection.
Red, orange, and yellow carotenoid-colored plumages have been considered honest …

Color varies in pattern and degree across the tree of life. In animals, genetic variation in
color is hypothesized to have pleiotropic effects on a variety of behaviors due to shared …

Female ornaments have long been considered non-functional, but a paradigm shift has
occurred over the 2 last decades. The adaptive nature of female ornaments is now widely …

Sexual selection theory has provided explanation for the evolution and function of elaborate
male traits, yet less effective in explaining female trait expression. Consequently, there …

We know little of the proximate mechanisms underlying the expression of signaling traits in
female vertebrates. Across males, the expression of sexual and competitive traits, including …

Historically, bird song complexity was thought to evolve primarily through sexual selection
on males; yet, in many species, both sexes sing and selection pressure on both sexes may …

Personality traits can remain consistent throughout adult life, but it is less clear when these
behavioural differences first arise and whether they are maintained across ontogenetic …

Darwin's finch species in the Galápagos Islands are famously distinguished by their
morphology but less attention has been given to behavioral differences between species. In …

Tests of long-term consistency in personality differences are not abundant. We studied
personality in common waxbills (Estrilda astrild) from one Autumn to the next, and also from …