Описание: Behold the power of nature with this illustrated field guide to recognizing and understanding the messages that the universe sends us through the birds we see in our daily lives. Birds are all around us-pecking at the sidewalk, perching on a nearby tree branch, flying in the sky above our heads. But have you considered the possibility that there is a deeper meaning behind each blue jay sighting or the call of a hawk? The Hidden Meaning of Birds can help you decipher the special message your avian oracle is trying to share.
The Hidden Meaning of Birds isn't just your typical field guide to birds. In addition to a physical description of a variety of common bird species, it also includes the folklore and unique symbolism associated with each to help you understand the changes these mystical creatures want you to make in your life. A blue jay may be urging you to examine your communication habits.
A cardinal may be telling you to stand up for yourself. The list goes on. The illustrations and descriptions are easy to follow along, and it includes beginner terms for both spiritual guidance and bird identification.
With this enlightening volume as your inspiration, get ready to reexamine your life from a bird's eye view-one robin, crow, and hummingbird at a time.
Автор: Searcy William A., Yasukawa Ken Название: Polygyny and Sexual Selection in Red-Winged Blackbirds: ISBN: 0691601070 ISBN-13(EAN): 9780691601076 Издательство: Wiley Рейтинг: Цена: 7286.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание:
The purpose of this book is to explain why red-winged blackbirds are polygynous and to describe the effects of this mating system on other aspects of the biology of the species. Polygyny is a mating system in which individual males form long-term mating relationships with more than one female at a time. The authors show that females choose to mate polygynously because there is little cost to sharing male parental care in this species, and because females gain protection against nest predation by nesting near other females. Polygyny has the effect of intensifying sexual selection on males by increasing the variance in mating success among males. For females, polygyny means that they will often share a male's territory with other females during the breeding season and will thus be forced to adapt to frequent female-female interactions.
This work reviews the results of many studies by other researchers, as well as presenting the authors' own results. Studies of red-winged blackbirds have ranged from long-term investigations of reproductive success and demography, to research on genetic parentage based on modern molecular methods, to a variety of experimental manipulations of ecological circumstances and behavior. Since the red-winged blackbird is one of the best studied species of any taxa in terms of its behavior and ecology, the authors have a particularly extensive body of results on which to base their conclusions.
Originally published in 1995.
The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These paperback editions preserve the original texts of these important books while presenting them in durable paperback editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
The Cooper's Hawk presents the general reader and professional biologists interested in birds and nature, with an authoritative account of the breeding biology of the what is perhaps the most abundant, backyard breeding raptor in North America. This urban status exists despite cross-generational human persecution through shooting of individuals and indirect felling of forests, their apparent preferred nesting habitat. Using conversational prose, the natural history of the bird's diet, including bird feeder use and disease concerns, courtship behavior, and the ecological themes of breeding density, reproductive success, and adult survivorship are described. There too is a focus on how and why fieldwork is conducted on this ubiquitous city dweller who preys mostly on birds, or 'urban fast food.' How urban birds may differ from their rural counterparts is addressed, and especially highlighted is the novel aspect of reproductive deceit in this red-eyed, blue-backed predator, as, unlike all other birds of prey studied to date, it is highly promiscuous. The text is complemented with original art and especially crisp photographs that demonstrate this bird's natural history.
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