In the 25th
1 year of the BBC's Natural History Unit - a series in 26 parts
Narrator
David Attenborough 12: Danger!
Many animals respond to the appearance of predators with a call that serves to warn others of the same or even different species, while' the alarm call itself has auditory characteristics that make it difficult to locate.
Wilma George of Oxford University, Peter Grieg -Smith of the University of Sussex. Peter Marler of Rockefeller University, New York,
Eugene Morton of the National Zoological Park,
Washington, and Tom Strusacker of the New
York Zoological Society, examine the vocal utterances of animals when danger threatens. Producer Michael BRIGHT BBC Bristol