Download or read book Density Demography and Mating Success of Kirtland s Warblers in Managed and Natural Habitats written by Carol Ina Bocetti and published by . This book was released on 1994 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatiotemporal Response of the Male Kirtland s Warbler Population to Changing Landscape Structure Over 26 Years written by Deahn Marie Donner and published by . This book was released on 2007 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book At the Crossroads extinction Or Survival written by and published by . This book was released on 1989 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Kirtland s Warbler written by William Rapai and published by University of Michigan Press. This book was released on 2012-02-08 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book looks at the Kirtland’s warbler and wildlife conservation in a way that no other book has. It looks back on the history of this unique bird, examines the people and policies that kept the warbler from extinction, explores the cult of personality that surrounds it, and examines the challenges of the future—all through the eyes of the people who have acted so passionately on its behalf. The story of the Kirtland’s warbler is a story of complex relationships between the bird and its environment, the humans who interact with it, and the complex government policies that affect it. And now, just when it appears that the Kirtland’s warbler has recovered for good, a change in its status may send the warbler’s population into a downward spiral once again.
Download or read book At the Crossroads extinction Or Survival written by and published by . This book was released on 1990 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Bird of Fire written by and published by . This book was released on 1981 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foraging Ecology of Kirtland s Warblers in Managed and Natural Breeding Habitat written by Jennifer Lynn Fussman and published by . This book was released on 1997 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: This study examines prey availability as a factor influencing breeding habitat selection by Kirtland's Warblers (Dendroica kirtlandii), and characterizes the foraging behavior of this endangered species. Kirtland's Warblers nest on the ground in early-successional jack pine forests in northern Lower Michigan. The species may reject old jack pine stands for nesting due to decreased prey density in lower branches and ground vegetation of old stands. Insects were captured in young and old nesting habitat and in mature jack pine too old to be attractive for breeding, and birds were observed foraging in young and old nesting habitat. Insect biomass in low vegetation was less in old nesting habitat than in young nesting habitat, and was much less in mature habitat. Kirtland's Warblers in old nesting habitat did not forage higher than those in young nesting habitat, suggesting that the decrease in insect biomass in old nesting habitat is not great enough to affect the birds. Managed plantations and natural wildfire-regenerated jack pine stands were very similar in terms of insect abundance, diversity, and distribution, and warbler behavior. Warblers foraged most often on jack pines, but also used ground vegetation and pin oak trees as foraging substrates. The proportion of foraging attempts in oak varied widely among stands, suggesting that warblers use oak in proportion to its availability. Female Kirtland's Warblers foraged significantly lower than males, following a general trend for species of parulid warblers.
Download or read book Habitat Selection and Reproductive Success in a Population of Cerulean Warblers in Southeastern Ontario written by Catherine J. Oliarnyk and published by Kemptville : Eastern Ontario Model Forest = Forét modèle de l'est de l'Ontario. This book was released on 1996 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigates the breeding biology, reproductive success and habitat use of a population of Cerulean Warblers (Dendroica cerulea), a poorly understood, threatened migrant songbird. I established study sites in three areas of mature deciduous forest in the Frontenac Axis region of Ontario: two in unmanaged forest, and the third in an area of selective cutting. Reproductive success was high over the two years of the study, with 20 of 27 pairs (74%) successfully fledging at least one young. Nest failure due to predation was relatively low (14.8%), and there were no known instances of brood parasitism by Brown-headed Cowbirds (Molothrus ater). High rates of success, associated with low rates of predation and brood parasitism, are likely attributable to the large area of contiguous forest in this region, which buffers the pressures of forest "edge effects."
Download or read book Demography and Habitat Use of Cerulean Warblers on Breeding and Wintering Grounds written by Marja Henni Bakermans and published by . This book was released on 2008 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Because their annual movements span continents, Nearctic-Neotropical migratory birds represent one of the most challenging groups for which effective conservation strategies can be developed. Knowledge of the ecology and management of migratory bird communities comes primarily from studies conducted on the breeding grounds. However, recent work demonstrates that events that occur throughout the annual cycle may also contribute to population declines. The Cerulean Warbler (Dendroica cerulea), a Neotropical migrant exhibiting precipitous population declines, is an excellent example of a species that may be impacted by events on both the breeding and nonbreeding grounds. My dissertation research examined habitat use and population demography of Cerulean Warblers on breeding (southern Ohio) and wintering (Venezuelan Andes) grounds to evaluate potential factors that contribute to declines in Cerulean Warblers. During the breeding season, we surveyed Cerulean Warblers across 12 mature forest sites in southeast Ohio, 2004-2006. Research on the breeding grounds identified 1) how clearcutting impacted spatial distribution, density, and nesting success of Cerulean Warblers at multiple spatial scales (i.e., from local/edge to landscape), and 2) specific microhabitat and nest-patch characteristics selected by Cerulean Warblers. At each site, Ceruleans were intensively spot-mapped 8 times each year from May to July, adult behavior was used to locate and monitor nesting attempts, and nest, local, and landscape habitat characteristics were quantified. Results suggest that the presence of regenerating clearcuts did not influence density or nesting success of Cerulean Warblers in adjacent mature forest. Instead, local habitat features explained variation in warbler density and daily nest survival better than landscape-scale characteristics. Density and nesting success were positively associated with features typical of heterogeneous steady-state phase forests. In particular, nest plots had 14%, 24%, and 94% greater canopy openness, understory stems, and number of grapevines, respectively. On the nonbreeding grounds, my research examined 1) the suitability of shade coffee plantations and 2) foraging and habitat use by wintering migrant birds, with emphasis on Cerulean Warblers. This portion of the study was conducted in 3 primary forest sites and 3 shade coffee plantations on the western slope of the Cordillera de Mérida of the Andes Mountains. At each site, migrants were surveyed using distance-based line transects, mist-netted and banded, and observed to characterize habitat use and flocking behavior during November to February 2005/06 and 2006/07. During these two seasons, 29 individual Cerulean Warblers were color-banded and resighted to estimate apparent monthly survival, annual return rates, and apparent annual survival. Densities of migrants were 3-14x higher in shade coffee plantations than primary forest sites, even after accounting for differences in detectability. Apparent monthly survival of Cerulean Warblers was estimated at 97% and overwinter persistence was similarly high. Banding data also suggest that migrants using shade coffee improve their body condition over the winter. Adult Cerulean Warblers had 62% higher apparent annual survival than juvenile birds (0.73 versus 0.45). Apparent monthly migration survival for adults (0.97) was similar to values throughout the remainder of the annual cycle, though juveniles experienced up to 6x higher mortality during migratory periods.
Download or read book The Kirtland s Warbler written by William Rapai and published by University of Michigan Press. This book was released on 2012-02-08 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: At a time when the world is seeing its species rapidly go extinct, the Kirtland's warbler is not just a survivor, it's a rock star. The Kirtland's warbler is the rarest warbler species in North America and will always be rare because of its persnickety nesting preferences. But when the total population fell below 400 birds in the 1970s and 1980s---driven largely by a loss of habitat and the introduction of a parasite---a small group of dedicated biologists, researchers, and volunteers vowed to save the Kirtland's warbler despite long odds. This is the story of the warbler's survival and gradual recovery, the people and policies that kept it from extinction, and the ongoing challenges that may again jeopardize the bird's future. In The Kirtland's Warbler, William Rapai explores the bird's fascinating natural history as well as the complex and evolving relationships between the warbler, its environment, its human protectors, and state and federal policies that today threaten to eradicate decades of work done on the species' behalf. Beginning with an account of the warbler's discovery in the mid-nineteenth century and ornithologists' desperate hunt for information on the elusive new species, the book goes on to examine the dramatic events that quickly led to the warbler's precarious status and its eventual emergence as a lightning rod for controversy. The Kirtland's warbler is often described as a "bird of fire" for its preference for nesting in areas cleared by wildfire. But it also warrants the name for the passion it ignites in humans. Both tragic and uplifting, the story of this intriguing bird is a stirring example of how strong leadership, vision, commitment, sustained effort, and cooperation can come together to protect our natural world.
Download or read book Ecology and Management of Cowbirds and Their Hosts written by James N. M. Smith and published by University of Texas Press. This book was released on 2014-09-05 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past two centuries, cowbirds have increased in numbers and extended their range across North America, while many of the native songbird species whose nests they parasitize to raise their young have declined. This timely book collects forty essays by most of the principal authorities on the biology and management of cowbirds. The book's goals are to explore the biology of cowbirds, the threats they pose to host species and populations, and the management programs that are being undertaken to minimize these threats. The book is organized into five sections, each with an extended editors' introduction that places the contributions in a broad, up-to-date setting. The sections cover: The changing abundance of cowbirds and the ways in which their numbers can be estimated. Host choice by cowbirds, the negative effects of cowbirds on particular host species, and the daily patterns of cowbird behavior. Behavioral interactions between cowbirds and specific host species. Patterns of cowbird abundance and host use across varying landscapes. Management programs designed to control cowbirds and protect threatened songbirds.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1995 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Savannas Barrens and Rock Outcrop Plant Communities of North America written by Roger C. Anderson and published by Cambridge University Press. This book was released on 1999-07-28 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: A coherent, readable summary of the technical information available on savannas, barrens and rock outcrop plant communities.
Download or read book General Technical Report RM written by and published by . This book was released on 1993 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status and Management of Neotropical Migratory Birds written by Deborah M. Finch and published by . This book was released on 1993 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology and Management of Neotropical Migratory Birds written by Thomas E. Martin and published by Oxford University Press. This book was released on 1995-10-19 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: The apparent decline in numbers among many species of migratory songbirds is a timely subject in conservation biology, particularly for ornithologists, ecologists, and wildlife managers. This book is an attempt to discuss the problem in full scope. It presents an ambitious, comprehensive assessment of the current status of neotropical migratory birds in the U.S., and the methods and strategies used to conserve migrant populations. Each chapter is an essay reviewing and assessing the trend from a different viewpoint, all written by leaders in the fields of ornithology, conservation, and population biology.
Download or read book Rare and Endangered Biota of Florida Birds written by and published by . This book was released on 1992 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
