Avian eggs contain substantial amounts of maternal hormones and so provide an excellent
model to study hormone-mediated maternal effects. We review this new and rapidly evolving …

Publisher Summary This chapter discusses the physiology, ecology, and behavior of
hormones in avian eggs. The main source of hormones found in avian eggs is the maturing …

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

Research into the lives of animals in their natural environments has revealed a rich tapestry
of complex social relationships and previously unsuspected social and mating systems. The …

Physiological Adaptations for Breeding in Birds is the most current and comprehensive
account of research on avian reproduction. It develops two unique themes: the consideration …

Male songbirds sing to establish territories and to attract mates. 1, 2 However, increasing
reports of singing in non-reproductive contexts 3 and by females 4, 5 show that song use is …

The bird dawn chorus has fascinated humans since ancient times, but still today numerous
questions remain unclear. This chapter will explore this puzzling phenomenon, a communal …

When selection on males and females differs, the sexes may diverge in phenotype.
Hormones serve as a proximate regulator of sex differences by mediating sex-biased trait …

Speech has long been thought of as a uniquely defining characteristic of humans. Yet song
birds, like humans, communicate using learned signals (song, speech) that are acquired …

One of the common assumptions in the study of the evolution of parental care is that trade‐
offs exist between parental investment and other fitness‐related traits. In general, this body …