Effects of predation risk on foraging behaviour and group size: adaptations in a social cooperative species

There is a divergence between models examining the evolution of group living in species in which groups are largely based on families and those based on fluid aggregations of nonrelatives. In the former, the onus has been on ecological and demographic factors that select for offspring philopatry; in the latter, the importance of factors such […]

Meerkat helpers increase sentinel behaviour and bipedal vigilance in the presence of pups

Helpers in cooperatively breeding species may assist in a number of cooperative activities, such as nest building, incubating, babysitting and feeding of offspring. In addition, individuals may engage in sentinel behaviour and other forms of vigilance, which benefits other group members not only by reducing the risk of predation, but also by allowing them to […]