Recent work has documented a wide range of important psychological differences across
societies. Multiple explanations have been offered for why such differences exist, including …

The evolution of cooperation among animals has posed a major problem for evolutionary
biologists, and despite decades of research into avian cooperative breeding systems, many …

Social organisation in animals takes many forms. It includes assemblages of territorial
animals, dominance hierarchies and social groups, among other things. The basic tenet that …

Literature Cited to accompany Animal Communication, 2e Page 1 Principles of Animal
Communication, Second Edition Jack W. Bradbury and Sandra L. Vehrencamp Chapter 14 …

Fish travel in schools, birds migrate in flocks, honeybees swarm, and ants build trails. How
and why do these collective behaviors occur? Exploring how coordinated group patterns …

In many cooperatively breeding vertebrates, a dominant breeding pair is assisted in
offspring care by nonbreeding helpers. A leading explanation for this altruistic behavior is …

Indirect genetic effects (IGE) occur when the genotype of an individual affects the phenotypic
trait value of another conspecific individual. IGEs can have profound effects on both the …

In many cooperatively breeding birds, kin selection has an important role in the evolution
and maintenance of social behaviour, and 'helpers' can maximize indirect fitness gains by …

The widespread belief that kin selection is necessary for the evolution of cooperative
breeding in vertebrates has recently been questioned. These doubts have primarily arisen …

The conundrum of why subordinate individuals assist dominants at the expense of their own
direct reproduction has received much theoretical and empirical attention over the last 50 …