Evolution selects for traits that are of adaptive value and increase the fitness of an individual
or population. Numerical competence, the ability to estimate and process the number of …

Using the comparative approach, researchers draw inferences about the evolution of
cognition. Psychologists have postulated several hypotheses to explain why certain species …

Concerns have been raised recently about the replicability of behavioral priming effects, and
calls have been issued to identify priming methodologies with effects that can be obtained in …

Darwin famously described special difficulties in explaining social evolution in insects. More
than a century later, the evolution of sociality-defined broadly as cooperative group living …

Abstract Knowledge of characteristics that promote group success during intraspecific
encounters is key to understanding the adaptive advantages of sociality for many group …

Male chimpanzees, Pan troglodytes, defend group territories, and sometimes injure or kill
members of other groups. To test which factors best predict the occurrence and outcomes of …

A large body of experimental evidence shows that animals as diverse as mammals, birds,
and fish are capable of processing numerical information. Considerable differences have …

Individual vocal recognition (IVR) has been well studied in mammals and birds. These
studies have primarily delved into understanding IVR in specific limited contexts (eg parent …

Savannah habitats comprise an ecologically important, but ultimately fragile, ecosystem.
They constitute one of the largest biomes on Earth, covering almost 20% of the land surface …

Although uniquely destructive and wasteful, intergroup conflict and warfare are not confined
to humans. They are seen across a range of group-living species, from social insects, fishes …