A herd of grazing 161 ewes were observed primarily to determine the manner in which they communicate with each other and the person observing them, as well as other aspects of their behavior.
Ewe vocalization was found to be elicited by the following factors : C, the presence of a person; (2) the sound of an engine running; @the appearance or sound of a feed sack; (4) a person calling the ewes. It was found that ewes always approached the observe with the expectation of receiving something.
Vocalization arising from such an expectation or “supply stimulus” was in the form of a high amplitude “ηae” which continued for a considerable period of time.
From these observations, ewes appear capable of distinguishing sounds associated with feed from other sound.
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