Clacking is a chugging noise produced by clicking tongue or tusks, producing copious saliva. Mother and Offspring Nose to-nose greeting, with explosive grunts. Mother summons piglets from burrow with soft, low grunts. Following mother in single file. Squeaking and churring of small piglets.
Expresses discomfort, distress.
Rank order thereby established at early age. Response to Predators Trotting with tail vertical. Marks general arousal rather than specific response to predator.