"Many raptors, the hawks, eagles, and falcons of the world, migrate over long distances, often in impressively large numbers. Many avoid crossing wide expanses of water and follow "flyways" to optimize soaring potential. Atmospheric conditions and landscape features, including waterways and mountain ranges, funnel these birds into predictable bottlenecks through which thousands of daytime birds of prey may pass in a short time. Birders a ..."
Raptors(1st Edition) The Curious Nature of Diurnal Birds of Prey by KeithL. Bildstein Hardcover, 336 Pages, Published 2017 by Comstock Publishing Associates ISBN-13: 978-1-5017-0579-3, ISBN: 1-5017-0579-2
"Migrating Birds and Their Ecology Kenneth P. Able. / GARY L. KRAPU Sandhill
Cranes and the Platte River lence, and finally a pandemonium of trumpets, rattles
, croaks, and cries that almost shakes the bog with its nearness, but without yet
disclosing whence it comes. At last a glint of sun reveals the approach of a great
echelon of birds. On motionless wing they emerge from the lifting mists, sweep a
final arc of sky, and settle in ..."
Vultures of the World Essential Ecology and Conservation (Hardcover) by KeithL. Bildstein Hardcover, 256 Pages, Published 2022 by Cornell University Press, Ithaca ISBN-13: 978-1-5017-6161-4, ISBN: 1-5017-6161-7
"At least 63 percent of the world's raptors migrate. Raptor Watch, compiled from contributions by over 800 observers worldwide, is a guide to 388 hotspots where these birds can be seen in their thousands. A repository of information for the specialist, this book is also a strategy document enabling conservationists working at the local and national level to cooperate globally to protect raptor migration networks. ""The most geographical ..."
WHITE IBIS (Smithsonian Nature Books) by KeithL. Bildstein Hardcover, 242 Pages, Published 1993 by Smithsonian ISBN-13: 978-1-56098-223-4, ISBN: 1-56098-223-3
RAPTOR WATCH (Birdlife Conservation Series Number 9) by Jorje I. Zalles, KeithL. Bildstein Hardcover, 438 Pages, Published 2000 by Smithsonian ISBN-13: 978-1-56098-817-5, ISBN: 1-56098-817-7
Vultures of the World Essential Ecology and Conservation by KeithL. Bildstein 265 Pages, Published 2022 by Cornell University Press ISBN-13: 978-1-5017-6502-5, ISBN: 1-5017-6502-7
"Based on decades of personal experience, dozens of case studies, and numerous up-to-date examples of cutting-edge science, this book introduces readers to the essential nature of vultures and condors."
Raptors The Curious Nature of Diurnal Birds of Prey by KeithL. Bildstein 336 Pages, Published 2017 by Cornell University Press ISBN-13: 978-1-5017-0785-8, ISBN: 1-5017-0785-X
"The Curious Nature of Diurnal Birds of Prey Keith L. Bildstein. needed to correct
their course if ... The expansion, which continued well into the latter half of the
twentieth century, was especially apparent in urban areas. By 1970, Richardson's
..."