Variation in ecological selection pressures has been implicated to explain variation in brain
size and architecture in fishes, birds and mammals, but little is known in this respect about …

Conflicting theories have been proposed to explain variation in relative brain size across the
animal kingdom. Ecological theories argue that the cognitive demands of seasonal or …

Many traits correlate with body size. Studies that seek to uncover the ecological factors that
drive evolutionary responses in traits typically examine these responses relative to …

In mammals, sexual size dimorphism often reflects the intensity of sexual selection, yet its
connection to genomic evolution remains unexplored. Gene family size evolution can reflect …

Natural selection is a major force in the evolution of vertebrate brain size, but the role of
sexual selection in brain size evolution remains enigmatic. At least two opposing schools of …

Acrobatic display behaviour is sexually selected in manakins (Pipridae) and can place high
demands on many neural systems. Manakin displays vary across species in terms of …

There are multiple hypotheses for the evolution of cognition. The most prominent
hypotheses are the Social Intelligence Hypothesis (SIH) and the Ecological Intelligence …

Competition over mates is a powerful force shaping trait evolution. For instance, better
cognitive abilities may be beneficial in male-male competition and thus be selected for by …

The evolution of cognitive abilities is inextricably linked to the evolution of the brain.
Although the bulk of the research on brain-cognition evolution has focused on primates and …

The scale and resolution of trait databases and molecular phylogenies is increasing rapidly.
These resources permit many open questions in comparative biology to be addressed with …