Life ...in the animal world
Introduced by Dr. Desmond Morris.

About a quarter of the 4,237 living species of mammals have developed the ability to fly. One species is Man and the other 981 are all Bats.
This strange form of life has become of increasing interest in many fields of research. These are described and discussed by:
Dr. Colin Pennycuick, University of Bristol
Dr. Ade Pye, Institute of Laryngology and Otology
Dr. David Pye, University of London
Paul Racey, Wellcome Institute Zoological Society of London
and John Hooper, Devon Spelaeological Society