A Comparison of Vocalizations of Red-tailed Monkeys and Blue Monkeys, Cercopithecus ascanius and C. mitis, in Uganda1


  • 1

    This paper is dedicated to Konrad Lorenz on the occasion of his 70th birthday. A fertile source of ideas and inspiration for so many, it was he who first interested me in the question whether animal signals arc arbitrary, a theme of this paper.

The Rockefeller University New York, New York 10021 (USA).