Humming is the most common sound an alpaca makes, a sort of musical purring. The mom calls to her cria by humming, or they hum to communicate with each other within the herd.

   When alarmed, a staccato tooting is made by one animal, then joined in by the rest of the herd as they focus attention in the direction of potential danger.

   During breeding, which lasts from 20 to 30 minutes, the males trumpets or ‘orgles’ a love song to his mate.