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 …

Birds exhibit remarkable variation in plumage patterns, both within individual feathers and
among plumage patches. Differences in the size, shape, and location of pigments and …

The study of avian signalling systems is an important avenue for research on animal
communication. More specifically, the use of plumage traits to signal status or fighting ability …

Research conducted in the last fifteen years has placed in question many of the traditional
conclusions scholars have formed about human female sexuality. Though conventional …

Organisms use signals of quality to communicate information about aspects of their relative
phenotypic and genetic constitution,,,. Badges of status,, are a subset of signals of quality …

Sex Differences serves as an advanced text for courses in evolutionary and human biology,
psychology, and sexuality and gender studies. It also serves as a reference source for …

Darwin (1871) proposed two modes of sexual selection: direct competition between
individuals of the same sex (intrasexual selection) and mate choice (intersexual selection) …

Song–type matching is a singing strategy found in some oscine songbirds with repertoires of
song types and at least partial sharing of song types between males. Males reply to the song …

Extrapair paternity has been suggested to represent a potentially important source of sexual
selection on male secondary sexual characters, particularly in birds with predominantly …

There is abundant evidence for the existence of marked mate preferences in natural
populations, but the occurrence of within-population variation in mate preferences has …