The current volume includes articles on sibling competition, hatching asynchrony, incubation period, and lifespan in altricial birds, predation and the limitation of bird numbers, and population trends in birds of eastern North America. Current Ornithology is the only English-language publication currently devoted exclusively to extensive reviews and synthesis of topics pertaining to all aspects of the biology of birds. Chapters fall under such diverse rubrics as ecology, evolution, behavior, phylogeny, behavioral ecology, anatomy and physiology, and conservation biology. All authors are leading authorities on their subjects, and each chapter is refereed by experts in the topics covered. Although all chapters focus primarily on birds, some topics, such as the social cognition of birds as compared to primates (Volume 13), have significant application to disciplines outside of ornithology. Current Ornithology aims to provide an accessible, up-to-date, accurate source of data and to contribute to conceptual generalization and unification across the biological sciences.Power, D. M. is the author of 'Current Ornithology' with ISBN 9780306445507 and ISBN 0306445506.