Cheaters—genotypes that gain a selective advantage by taking the benefits of the social
contributions of others while avoiding the costs of cooperating—are thought to pose a major …

The ability to generate new meaning by rearranging combinations of meaningless sounds is
a fundamental component of language. Although animal vocalizations often comprise …

In her comprehensive and carefully crafted book, Gisela Kaplan demonstrates how
intelligent and emotional Australian birds can be. She describes complex behaviours such …

In many species, individuals must contribute extensively to offspring care to reproduce
successfully. Within species, variation in care is driven by local social, physiological, and …

Kin selection theory has been the central model for understanding the evolution of
cooperative breeding, where non-breeders help bear the cost of rearing young. Recently …

For individuals collaborating to rear offspring, effective organization of resource delivery is
difficult because each carer benefits when the others provide a greater share of the total …

Providing food to develo** offspring is beneficial for offspring but costly for carers.
Understanding patterns of provisioning thus yields important insights into how selection …

A core component of human language is its combinatorial sound system: meaningful signals
are built from different combinations of meaningless sounds. Investigating whether …

Vocalisations represent the primary mode of communication for most birds and vary greatly
in form and function within and between species. Cataloguing the vocal repertoire of a …

Alloparental care by distant/nonkin that accrue few kin-selected benefits requires direct
fitness benefits to evolve. The pay-to-stay hypothesis, under which helpers contribute to …