Some hyena vocalisations that sound cow-like are actually part of their complex communication repertoire. These sounds are often made by spotted hyenas, and they serve various purposes. The vocalisation in the video, for instance, resembles the sound of a cow’s moo and is used to communicate with other clan members status and dominance. Notice the subordinate lifts her hind leg so the more dominant individual can sniff her genitals. These rituals can escalate into violence, especially if the sub