Behaviour |
|
Feeding |
Handling or consuming food items |
Resting |
Prolonged stationary position, with or without eyes closed |
Grooming |
Auto- or allo-grooming (giver and receiver identity were collected) |
Social |
Mating, play, aggressive, or parental behaviour |
Moving |
Travel within or between trees (at least 2 metres) |
Vigilance |
Scanning the environment, head rotating by at least 45° (Koenig, 1998) |
Other |
Behaviour not classified into any of the above categories |
Body position |
Hanging |
Suspended in the air, grabbing a branch or a tree part with at least one arm |
Sitting/Lying down |
Sitting on a branch or on the ground / Resting in horizontal position |
Gaze direction (staring at a specific location/direction/animal/person for ≥ 3s) |
Speaker |
Staring in the direction of the speaker |
Ground |
Looking towards or actively scanning the ground |
Canopy |
Looking around, or towards a specific location in the trees at the same elevation as the animal location |
Sky |
Looking up at the sky |
Group member |
Looking at a group member (the identity of the receiver was collected) |
Observer |
Looking at the observer |
Elsewhere |
Looking in a direction that cannot be classified into any of the above categories |
Nowhere |
Resting with eyes closed |
Other measurements |
Elevation (m) |
Height of the animal in relation to the ground |
Proximity (m) |
Distance between the two focal individuals (paired male and female) |
Defaecation/Urination |
Exuding faeces and/or urine |
Dropping branch |
Individuals shaking branch(es) so as it ended up falling on the ground |
Latency of first look towards the speaker (s) |
Time elapsed between stimulus onset and first look towards the speaker |
Duration of first look towards the speaker (s) |
Duration of first gaze directed towards the speaker location |