Gerbils exhibit stable, family-specific vocal dialects over weeks, suggesting vocal communication may play a key role in representing kinship in natural social groups.

New immigrants triggered fast uptake of a novel food in groupmates, who obtained information about it through muzzle contacts, opening up new questions about the role of dispersers in information flow around a population.

The rapid and gradual fin whale songs changes adopted by individuals of a certain area provide evidence of vocal learning in this species, elucidate patterns of song evolution and hints on the limits of song variation.