The evolution of primates is usually approached from the standpoint of adaptation and
interspecific competition. However, climatic and eustatic changes associated with periodic …

Investigating in depth the mechanisms underlying human and non‐human primate
intentional communication systems (involving gestures, vocalisations, facial expressions …

I examined how Sulawesi Tonkean macaques (Macaca tonkeana) respond in terms of their
diet and activity patterns to anthropogenic habitat alteration in Lore Lindu National Park …

Highlights•Lions yawn when they are relaxed and engage in social affiliation.•The arousal
state seems to inhibit yawning in wild lions.•Wild lions are infected by others' yawns.•Yawn …

Social play and tolerance are positively correlated and playful signals are more freely
expressed in egalitarian than in despotic species. Macaque species are organized along a …

Primate facial expression has long been studied within a framework of emotion that has
heavily influenced both theoretical approaches and scientific methods. For example, our …

Conversion of primary rainforest to agricultural land causes habitat loss and fragmentation
and is a major threat to wild primates worldwide. Conversion of forest to oil palm plantations …

We tested the social complexity hypothesis which posits that animals living in complex social
environments should use complex communication systems. We focused on two components …

Objectives While it has been demonstrated that even subtle variation in human facial
expressions can lead to significant changes in the meaning and function of expressions …

In primates, females typically drive the evolution of the social system and present a wide
diversity of social structures. To understand this diversity, it is necessary to document the …