A short (1-2 seconds in duration) rumble made by an infant or calf when approached and or touched in a caring way by an older member of its family. This rumble has a rising and falling 'aauurrrrr' quality and is typically soft and tonal, though may sometimes be louder and more noisy. We refer to rumbles given in this context as As-Touched-Rumbles. The calling infant or calf engages Head-Raising and Ear-Lifting as it calls, behavior that is comparable to that exhibited by older individuals in the context of a Little-Greeting-Rumble and the quality of the As-Touched-Rumble is also similar.
Like Little-Greeting-Rumbles, the calls given by calves in the context of receiving an affiliative gesture are highly variable, ranging from rather soft, unmodulated tonal rumbles to louder, more modulated and sometimes rather noisy rumbles. We believe that the difference, in both call types, is an expression of the intensity of emotion experienced by the calling individual. We postulate that the As-Touched-Rumble is a precursor to the Little-Greeting-Rumble.
References: Poole 2011. (Full reference list)
This behavior occurs in the following context(s): Affiliative