Download or read book A Study of Social and Competitive Behavior in the Red winged Black Bird and the Yellow headed Blackbird in Sherburne County Minnesota written by Joel Vernon Kussman and published by . This book was released on 1968 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red winged Blackbirds written by Les D. Beletsky and published by University of Chicago Press. This book was released on 1996 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawing on detailed data from their sixteen-year study of red-winged blackbirds in the marshes of Washington's Columbia National Wildlife Refuge, Beletsky and Orians analyze the information redwings use to make breeding-season decisions and the consequences these decisions have for lifetime reproductive success. Because male and female redwings make different, and often independent, decisions—males focus on territory acquisition and maintenance, while females must choose when and where to nest and how much energy to invest in reproduction—the authors have taken the novel approach of studying the sexes separately. Using analyses of observational data combined with field experiments and game-theoretical models, the authors provide new insights into the complex patterns of reproductive decision-making and breeding behavior in redwings. This book will be of interest to all who study social animals, including behavioral ecologists, evolutionary biologists, and ornithologists.
Download or read book A Comparative Study of the Behavior of Red Winged Tricolored and Yellow Headed Blackbirds written by Gordon H. Orians and published by . This book was released on 1968 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparative Study of the Behavior of Red Winged Tri Colored and Yellow Headed Blackbirds written by Gordon H. Orians and published by . This book was released on with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Red winged Blackbird written by Les Beletsky and published by . This book was released on 1996 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Red-winged Blackbird is not only one of North America's commonest birds, but also its best studied. It exemplifies the contribution that in-depth species studies can make to many of the central issues in behavioral ecology. In this book, Les Beletsky calls on 20 years experience of redwings to provide an up-to-date, comprehensive summary of all the major work done with these birds. These studies on the redwings' polygynous breeding system, strong territoriality, complex vocal communications, and broad distribution shed light on many themes of key interest to behaviorists and ecologists interested in the evolution of mate choice and species adaptations to habitats which vary in character in different parts of their range. An extra dimension is added in the consideration of redwings as pests, a widespread and often serious problem in crops of rice and corn. This book is written in an easy style, and will serve as an introduction, to both student and layperson, to redwings and what they can teach us of behavioral ecology. The Red-winged Blackbird provides the research worker with a balanced summary and comprehensive bibliography of one of ornithology's widest and deepest studies. Key Features * Covers perhaps the most studied bird in North America * Presents model species for studies in mating systems, habitat selection, vocal communication, and territorial behavior * Includes a comprehensive bibliography * Presented in an accessible style, ideal for student use
Download or read book A Comparative Study of the Behavior of Red winged Tricolored and Yellow headed Blackbirds written by Gordon H. Orians and published by . This book was released on 1968 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Adaptations of Marsh nesting Blackbirds written by Gordon H. Orians and published by Princeton University Press. This book was released on 1980-04-21 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: The variety of social systems among the New World blackbirds (Family Icteridae) and the structural simplicity of their foraging environment provide excellent opportunities for testing theorics about the adaptive significance of their behavior. Here Gordon Orians presents the results of his many years of research on how blackbirds utilize their marsh environments during the breeding season. These results stem from information he gathered on three species during ten breeding seasons in the Pacific Northwest, on Red-winged blackbirds during two breeding seasons in Costa Rica, and on three species during one breeding season in Argentina. The author uses models derived from Darwin's theory of natural selection to predict the behavior and morphology of individuals as well as the statistical properties of their populations. First he tests models that predict habitat selection, foraging behavior, territoriality, and mate selection. Then he considers some population patterns, especially range of use of environmental resources and overlap among species, that may result from those individual attributes. Professor Orianns concludes with an overview of the structure of bird communities in marshes of the world and the relation of these patterns to overall source availability in these simple but productive habitats.
Download or read book Polygyny and Sexual Selection in Red Winged Blackbirds written by William A. Searcy and published by Princeton University Press. This book was released on 2014-07-14 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 editions preserve the original texts of these important books while presenting them in durable paperback and hardcover 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.
Download or read book A Behavior Study of the Red winged Blackbird written by Robert W. Nero and published by . This book was released on 1956 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Territorial and Mating Behavior of the Red winged Blackbird written by Robert W. Nero and published by . This book was released on 1955 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Study of Territorial Behavior in the Red wing Blackbird written by Frank Willard Peek and published by . This book was released on with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Breeding Red winged Blackbirds in North Dakota Have Decreased Since 1967 But Yellow headed Blackbirds and Grackles Have Greatly Increased written by U.S. Fish and Wildlife Service and published by . This book was released on 1982 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Resource Competition Among Nestling Red winged Blackbirds agelaius Phoeniceus written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Red-winged blackbird ('Agelaius phoeniceus') females hatch their offspring asynchronously, creating mixed-aged broods comprising first-hatched "core" nestlings and later-hatched "marginal" offspring. Nestlings communicate their requirements to the parents using a combination of vocal and visual behaviours. Other studies of begging have focused solely on the need for food; here I incorporate thermal care as a resource. I begin by outlining the ontogeny of begging by red-winged blackbird nestlings using data collected from video-taped nests. My results indicate that parents use the collective begging efforts of the brood to assess both the thermal and nutritional requirements of the brood--the female parent responds to a weak collective effort by increasing nest attentiveness whereas a strong effect stimulates foraging. I compare the begging behaviour of core vs. marginal offspring at three phases of brood d6elopment, to determine whether developmental disparities influence the outcome of begging competitions. My results indicate that the outcome of begging competitions is primarily determined by size. Consequently, larger nestlings consistently receive more food. I develop a novel, non-surgical technique to mute nestlings temporarily in order to separate vocal from visual begging displays. My results indicate that food allocation is determined principally on the basis of visual displays, but that the foraging is regulated by the cumulative vocalizations of the brood. A secondary effect of the muting treatment is to reduce the length of time that nestlings beg, to which parents respond by increasing nest attentiveness. Finally, I compare parent-offspring interactions in unparasitised broods of red-winged blackbirds, to broods parasitised by the brown-headed cowbird ('Molothrus ater ') across the nestling period. Cowbird nestlings differ from host nestlings by maintaining a consist nt begging effort, and by begging for a lengthy period of time, particularly following t.
Download or read book The Scientific Basis for Conserving Forest Carnivores written by Leonard F. Ruggiero and published by . This book was released on 1994 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: This cooperative effort by USDA Forest Service Research and the National Forest System assesses the state of knowledge related to the conservation status of four forest carnivores in the western United States: American marten, fisher, lynx, and wolverine. The conservation assessment reviews the biology and ecology of these species. It also discusses management considerations stemming from what is known and identifies information needed. Overall, we found huge knowledge gaps that make it difficult to evaluate the species' conservation status.
Download or read book Our Mountains are Our Pillows written by Brian O. K. Reeves and published by . This book was released on 2001 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Ecological Characterization of Rocky Mountain Montane and Subalpine Wetlands written by and published by . This book was released on 1986 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shorebird Management Manual written by Douglas L. Helmers and published by Wetlands for the Americas. This book was released on 1992 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
