Looking out for each other: coordination and turn taking in common marmoset vigilance

For small, arboreal marmoset monkeys, antipredator vigilance is essential to ensure survival. However, since incompatible with some other behaviours, such as feeding in a head-down position, it has be regulated efficiently within individuals and perhaps even at the group level. To investigate what drives individual differences behaviour common marmosets, Callithrix jacchus, whether they adjust these behaviours each other, we collected behavioural data on 14 marmosets contexts where were mutually exclusive. The presence of infants resulted higher overall less feeding. Moreover, increased their when pair mate was thus could not vigilant itself. They adjusted own risk level mate, which turn taking-like pattern being pair. This flexibility consistent marmosets' sensitivity other's needs another context, food sharing, sharing more difficult obtain. Together, results suggest considerable awareness current state members marmosets.