[PDF] Conserving Migratory Birds eBook

Author : Deborah M. Finch
Publisher :
Page : 32 pages
File Size : 30,47 MB
Release : 1991
Category : Bird populations
ISBN :

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This report was prepared in support of the National Fish and Wildlife Foundation's Neotropical Migratory Bird Conservation Program and the USDA Forest Service's role in the program. Recent analyses of data on forest-dwelling species, many of which are neotropical migrants, show population declines in many North American areas. The literature review summarizes current information on population trends of neotropical migratory birds and the factors affecting migrant populations on the breeding and wintering grounds. Opportunities for research, monitoring, and conservation of these migrants on Forest Service lands are discussed.

Author : David S. Wilcove
Publisher : Island Press
Page : 255 pages
File Size : 11,82 MB
Release : 2012-09-26
Category : Nature
ISBN : 159726377X

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Animal migration is a magnificent sight: a mile-long blanket of cranes rising from a Nebraska river and filling the sky; hundreds of thousands of wildebeests marching across the Serengeti; a blaze of orange as millions of monarch butterflies spread their wings to take flight. Nature’s great migrations have captivated countless spectators, none more so than premier ecologist David S. Wilcove. In No Way Home, his awe is palpable—as are the growing threats to migratory animals. We may be witnessing a dying phenomenon among many species. Migration has always been arduous, but today’s travelers face unprecedented dangers. Skyscrapers and cell towers lure birds and bats to untimely deaths, fences and farms block herds of antelope, salmon are caught en route between ocean and river, breeding and wintering grounds are paved over or plowed, and global warming disrupts the synchronized schedules of predators and prey. The result is a dramatic decline in the number of migrants. Wilcove guides us on their treacherous journeys, describing the barriers to migration and exploring what compels animals to keep on trekking. He also brings to life the adventures of scientists who study migrants. Often as bold as their subjects, researchers speed wildly along deserted roads to track birds soaring overhead, explore glaciers in search of frozen locusts, and outfit dragonflies with transmitters weighing less than one one-hundredth of an ounce. Scientific discoveries and advanced technologies are helping us to understand migrations better, but alone, they won’t stop sea turtles and songbirds from going the way of the bison or passenger pigeon. What’s required is the commitment and cooperation of the far-flung countries migrants cross—long before extinction is a threat. As Wilcove writes, “protecting the abundance of migration is key to protecting the glory of migration.” No Way Home offers powerful inspiration to preserve those glorious journeys.

Author : American Bird Conservancy
Publisher : Mountaineers Books
Page : 0 pages
File Size : 15,37 MB
Release : 2019
Category : Nature
ISBN : 9781680512113

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Foreword by Jonathan Franzen Original poem by Margaret Atwood With species ranging from tiny iridescent-green hummingbirds to giant, gangly flightless rheas, the Americas feature an astonishing array of birds that rely upon the region's tremendous diversity of habitats. That reliance may be very localized or it may reach across continents: Swainson's Thrushes travel from South America all the way to Alaska, while certain grebes spend their entire lives on a single lake. Treasured songbirds feed at northern backyard feeders yet often arrive from points far to the south. The American Bird Conservancy (ABC) works across the Americas with a goal to have birds routinely prioritized in all land-use and policy decision-making. Bringing Back the Birds showcases these efforts, alongside the stunning photography of Owen Deutsch and eloquent essays from renowned experts in the field: Peter P. Marra, Smithsonian Migratory Bird Center; researchers Kimberly and Kenn Kaufman; John W. Fitzpatrick, Cornell Lab of Ornithology; and Mike Parr, EJ Williams, and Clare Nielsenof ABC.

Author : Peter Berthold
Publisher : Springer Science & Business Media
Page : 601 pages
File Size : 50,21 MB
Release : 2013-03-09
Category : Science
ISBN : 3662059576

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P. Berthold and E. Gwinnd Bird migration is an intriguing aspect of the living world - so much so that it has been investigated for as long, and as thoroughly, as almost any other natural phenomenon. Aristotle, who can count as the founder of scientific ornithology, paid very close attention to the migrations of the birds he ob served, but it was not until the reign of Friedrich II, in the first half of the 13th century, that reliable data began to be obtained. From then on, the data base grew rapidly. Systematic studies of bird migration were introduced when the Vogelwarte Rossitten was founded, as the first ornithological biological observation station in the world (see first chapter "In Memory of Vogelwarte Rossitten"). This area later received enormous impetus when ex perimental research on the subject was begun: the large-scale bird-ringing experiment initiated in Rossitten in 1903 by Johannes Thienemann (who was inspired by the pioneering studies of C. C. M. Mortensen), the experiments on photoperiodicity carried out by William Rowan in the 1920s in Canada and retention and release experiments performed by Thienemann in the 1930s in Rossitten, the first experimental study on the orientation of migratory birds. After the Second World War, migration research, while continuing in the previous areas, also expanded into new directions such as radar ornithology, ecophysiology and hormonal control mechanisms, studies of evolution, ge netics, telemetry and others.