The first comprehensive review of all aspects of the biology of moult, drawing information
from across the literature and in all birds, from penguins to passerines. Feathers are …

Avian plumage has captivated scientists and the public alike for generations and has been a
fundamental study system for research into signal evolution. By contrast, relatively little …

Whether melanin-based plumage colouration accurately reflects a bird's quality is still
controversial. To better understand potential mechanisms behind the observed variation in …

Conspicuous carotenoid ornamentation is considered a signal of individual “quality” and
one of the most intensely studied traits found to co-vary with parasitism. Since it has been …

Bird songs are considered a sexually selected trait that can reflect the individual health of
males as well as the vitality of potential mates and their competitors. Vocalization features …

Carotenoid-based integument coloration is extremely widespread in animals and commonly
used as an honest signal of condition in sexual selection. Besides being used for color …

Traits used by dependent young to obtain parental care are often interpreted in the context
of offspring–parent communication, with offspring traits offering parents some information …

A central issue in avian ecology deals with the trade‐off between investment life‐history
components, such as reproductive effort, and parasite and disease resistance. During …

Hypotheses postulating parasite‐mediated mate choice intrinsically assume that parasitic
infections deteriorate the quality of male ornamentation. Although this assumption has often …

Although the selective loss of individuals susceptible to disease can favor the evolution of
female preference for older males, the interrelationship between age, infection, longevity …