Species: Gorilla

Use: General 

Authors: G. Wood, D. L. Forthman, J. J. Ogden, Zoo Atlanta

Methods: Scan sampling

Publications/Presentations: N/A

Behaviors

Position and activity

Lie: Dorsally, ventrally, or side (includes lying with 1 shoulder touching ground, or leaning ventrally on both elbows).

Sit: Includes squat and leaning on one elbow.

Stand: Includes bipedal and quadrupedal (back legs are both straight).

Locomote: Any moving of the animal's entire body includes walking, running (bipedal).

Climb: Climbing a substrate.

Hang/swing: Hanging a swinging from a substrate.

Solitary behaviors

Autogroom: Pick through own hair with fingers and/or lips.

Object manipulate: Manipulating available non-food item with hands, feet, or mouth: e.g., branches, rocks, or bark (if not attempting to each items).

Carry/hold: Carrying or holding a non-food item with hands, feet or draped across back. Either while locomoting or stationary.

Solitary play: Self-motion play.

Masturbation: Manipulating genitals.

Social Behaviors

Proximity: Within one arm's length to another group member.

Social contact: In contact with another group member.

Social groom: Pick through another's hair with fingers or lips.

Social play: Includes all notion social play behaviors: chase, somersault, hit, etc.

Sex: Includes mount, insertion, genital inspection, etc.

Displays/Threats

Quad. stiff stance: Animal standing; stiff manner; with elbows turned inward (in tense situation).

Stiff walk: As above, but walking quadrupedally.

Tight lip: Lips compressed together.

Bared teeth/openmouth: Mouth open with lips pulled back over teeth.

Agonism: Aggression with contact, including; biting, fighting, hitting, slapping, and lunge with hit.

Lunge: Animal rushes at another (without hit).

Chest beat: Slapping chest alternately with hands (includes beating of thighs by females).

Wall beat: Beat/slap wall or other substrate.

Throw object: Throwing an object, frequently exhibited before lunge.

Abnormal behavior

Self-biting: Usually of arms, legs, torso, hands.

Self-clasping/self-grasping: Self-embracing, or holding onto a body part.

Stereotyped pacing: Pacing, walking in circles.

Rocking: Often associated with self-clasping.

Coprophagia: Ingestion of any fecal material.

Regurgitation/reingestion: Regurgitation and reingestion of feeding matter.

Out of view

Other: Any other behavior of interest not listed.

Feeding behavior

Carry/hold food: Carry or holding food enrichment item.

Foraging: Gathering and collecting food items.

Process food: Processing, preparing, stripping, peeling, seek, remove pith, sucking, husking and chewing. Some processing may take place inside the buccal cavity (e.g., peeling).