Social complexity has been one of the recent emerging topics in the study of animal and
human societies, but the concept remains both poorly defined and understood. In this paper …

BACKGROUND Whereas early studies of animal evolution focused principally on the
adaptations of different species to their physical environment, more recent studies have …

Pair bonding is a psychological construct that we attempt to operationalize via behavioral
and physiological measurements. Yet, pair bonding has been both defined differently in …

The Parental Brain: Mechanisms, Development, and Evolution presents a comprehensive
analysis of how the brain regulates parental behavior in nonhuman animals and in humans …

Coordinated pair bonds are common in birds and also occur in many other taxa. How do
animals solve the social dilemmas they face in coordinating with a partner? We developed …

Vertebrate gut microbiota form a key component of immunity and a dynamic link between an
individual and the ecosystem. Microbiota might play a role in social systems as well …

The complexity of primates' singing behavior has long gathered the attention of researchers
interested in understanding the selective pressures underpinning the evolution of language …

The age of individuals has consequences not only for their fitness and behaviour but also for
the functioning of the groups they form. Because social behaviour often changes with age …

Abstract “Monogamy” and pair bonding have long been of interest to anthropologists and
primatologists. Their study contributes to our knowledge of human evolutionary biology and …

Behavioral ecologists, evolutionary biologists, and anthropologists have been long
fascinated by the existence of “monogamy” in the animal kingdom. Multiple studies have …