Table 1.

Definition of activity categories

Activity	Definition (following Nadjafzadeh and Heymann 2008)
Feeding	Eating pulp, seeds, leaves, flowers, prey, or other food items
Foraging	Looking for food, holding and manipulating food, grabbing prey
Locomotion	Moving a distance of ≥1 m
Resting	Remaining stationary for at least 10 s without making body contact with another individual
Social	Remaining stationary with body contact; allogrooming; social playing; vocalizing
Other	Activities not fitting into any of the other categories, e.g., defecating, urinating