In recent years there has been a rapid increase in the understanding of communication between animals and this is perhaps especially true of bio-acoustics. In the last 35 years a completely new branch of bio- acoustics, involving ultrasounds, has been made possible by technical developments that now allow these inaudible sounds to be detected and studied. This subject has a personal fascination for the authors, perhaps because of the novelty of 'listening in' to these previously unknown sig- nals, perhaps because of the wide variety of ways in which different animals use them. Many studies of...
In recent years there has been a rapid increase in the understanding of communication between animals and this is perhaps especially true of bio-acous...
