Embodied variation in the sequential greetings of the (dairy) cow.

<br/>A dairy cow may produce a nasal-like ‘mmmm’ sound initiating intraspecies/interspecies greeting.<br/>•‘Mmmm’ acknowledges any newcomer in the barn, but only a familiar human in the meadow.<br/>•Individual cows go to the next steps in the opening stages of an encounter only after a reciprocated greeting token.<br/>•Individual cows in their social encounter continuously check the interactional participant before moving to the next step collaboratively.