▪ Abstract Human speech and birdsong have numerous parallels. Both humans and
songbirds learn their complex vocalizations early in life, exhibiting a strong dependence on …

Birdsong is often regarded as an aggressive signal. More specifically, particular singing
behaviours are hypothesized to be threatening, including song type matching, frequency …

Literature Cited to accompany Animal Communication, 2e Page 1 Principles of Animal
Communication, Second Edition Jack W. Bradbury and Sandra L. Vehrencamp Chapter 14 …

Gull chicks beg for food from their parents. Peacocks spread their tails to attract potential
mates. Meerkats alert family members of the approach of predators. But are these--and other …

Speciation in many animal taxa is catalysed by the evolutionary diversification of mating
signals. According to classical theories of speciation, mating signals diversify, in part, as an …

Behavioral evolution can be influenced by constraints, for example, of phylogeny and
performance. In this paper I describe a pattern in the evolution of birdsongs that may reflect a …

Overview 640[Auk, Vol. 123 be adjusted to reduce masking,(2) how do these adjustments
come about, and (3) what are the consequences of these changes for individual fitness and …

Songs of birds comprise hierarchical sets of vocal gestures. In zebra finches, songs include
notes and syllables (groups of notes) delivered in fixed sequences. During singing, premotor …

Publisher Summary This chapter outlines the evolution of geographic variation in birdsong.
Studies of vocal signals in birds offer potentially useful opportunities for empirical tests of the …

Female songbirds are thought to assess males based on aspects of song, such as repertoire
size or amount of singing, that could potentially provide information about male quality. A …