1) Animal communication 
Zoosemiotics is the semiotic study of the use of signs among animals, more precisely the study of semiosis among animals, i.e. the study of how something comes to function as a sign to some animal. Considered part of biosemiotics, zoosemiotics is related to the fields of ethology and animal communication. It was developed by semiotician Thomas Seb...
study of animal communication
zoosemiotics 1. The study of animal communication. 2. The study of the methods by which animals use signaling as a form of communication.
the study of the sounds and signals used in animal communication, as song in birds or tail-wagging in dogs.
The investigation of communications systems used by animals.