Highlights•Yawning is a highly conserved neurophysiological adaptation among
vertebrates.•The detection of yawning appears to be biologically important in social …

Automatic mimicry, where social animals mimic the emotional expressions of others, is a
well-documented phenomenon. While research has extensively examined how being …

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 …

Yawn contagion occurs when individuals yawn in response to the yawn of others (triggers).
This is the first account of yawn contagion in wild geladas (Theropithecus gelada), a monkey …

Behavioural contagion is a widespread phenomenon in animal species, which is thought to
promote coordination and group cohesion. Among non-human primates, however, there is …

In social mammals, conflict resolution involves the reunion of former opponents (aggressor
and victim) after an aggressive event (reconciliation) or post-conflict triadic contacts with a …

Play fighting can originate from different behavioural systems, including aggression and
affiliation and can have a competitive and/or cooperative nature. Domestic pigs engage in …

In primates, yawn contagion (the yawning response elicited by others' yawn) is variably
influenced by individual (eg, sex, age) and social factors (eg, familiarity) and possibly linked …

Yawn contagion (YC) is, compared to spontaneous yawning, an evolutionary recent
phenomenon probably linked to behavioral synchronization in highly social species that is …

Contrary to spontaneous yawning, yawn contagion occurs when yawning in a subject
(responder) is elicited by the yawns of others (triggers). Yawn contagion has been …