Huxley (1923) Suggested That Many Signals Get Their Start as Part

Q23: Display flights of birds differ from ordinary

Q24: Zahavi (1975, 1977) suggested that if a

Q25: Vasodilation, changes in respiration, and piloerection are

Q26: Behaviors that have become freed from the

Q27: We expect the coordination of mating activities

Q29: Diversity in signal forms both between and

Q30: Herbert Terrace was highly critical of the

Q31: Chimpanzees Washoe, Sarah, and Lana were all

Q32: Factors that favor an honest communicative signal

Q33: Dawkins and Krebs (1978) suggested that animals