Momentum: Feathers and wings, beaks and bills PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Momentum: Feathers and wings, beaks and bills PDF full book. Access full book title Momentum: Feathers and wings, beaks and bills by James Frances. Download full books in PDF and EPUB format.
Author: James Frances
Publisher:
ISBN: 9781420201222
Category : Birds
Languages : en
Pages : 24
Get Book Here
Book Description
"This book discusses where birds live, how they move and how they care for their young.Reading Age: 9-10 yearsText Type: Explanation
Author: James Frances
Publisher:
ISBN: 9781420201222
Category : Birds
Languages : en
Pages : 24
Get Book Here
Book Description
"This book discusses where birds live, how they move and how they care for their young.Reading Age: 9-10 yearsText Type: Explanation
Author: James Frances
Publisher:
ISBN: 9780439647878
Category : Birds
Languages : en
Pages : 24
Get Book Here
Book Description
Author: Troll Communications L.L.C.
Publisher:
ISBN: 9780816747726
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Lester Sylvan Ivins
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 250
Get Book Here
Book Description
Author: Gary W. Kaiser
Publisher: UBC Press
ISBN: 0774859814
Category : Science
Languages : en
Pages : 402
Get Book Here
Book Description
Birds are among the most successful vertebrates on Earth. An important part of our natural environment and deeply embedded in our culture, birds are studied by more professional ornithologists and enjoyed by more amateur enthusiasts than ever before. However, both amateurs and professionals typically focus on birds' behaviour and appearance and only superficially understand the characteristics that make birds so unique. The Inner Bird introduces readers to the avian skeleton, then moves beyond anatomy to discuss the relationships between birds and dinosaurs and other early ancestors. Gary Kaiser examines the challenges scientists face in understanding avian evolution - even recent advances in biomolecular genetics have failed to provide a clear evolutionary story. Using examples from recently discovered fossils of birds and near-birds, Kaiser describes an avian history based on the gradual abandonment of dinosaur-like characteristics, and the related acquisition of avian characteristics such as sophisticated flight techniques and the production of large eggs. Such developments have enabled modern birds to invade the oceans and to exploit habitats that excluded dinosaurs for millions of years. While ornithology is a complex discipline that draws on many fields, it is nevertheless burdened with obsolete assumptions and archaic terminology. The Inner Bird offers modern interpretations for some of those ideas and links them to more current research. It should help anyone interested in birds to bridge the gap between long-dead fossils and the challenges faced by living species.
Author: Otto Lilienthal
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 202
Get Book Here
Book Description
Author: Gregg Michael Levoy
Publisher: Harmony
ISBN: 0609803700
Category : Self-Help
Languages : en
Pages : 349
Get Book Here
Book Description
How do we know if we're following our true callings? How do we sharpen our senses to cut through the distractions of everyday reality and hear the calls that are beckoning us? is the first book to examine the many kinds of calls we receive and the great variety of channels through which they come to us. A calling may be to do something (change careers, go back to school, have a child) or to be something (more creative, less judgmental, more loving). While honoring a calling's essential mystery, this book also guides readers to ask and answer the fundamental questions that arise from any calling: How do we recognize it? How do we distinguish the true call from the siren song? How do we handle our resistance to a call? What happens when we say yes? What happens when we say no? Drawing on the hard-won wisdom and powerful stories of people who have followed their own calls, Gregg Levoy shows us the many ways to translate a calling into action. In a style that is poetic, exuberant, and keenly insightful, he presents an illuminating and ultimately practical inquiry into how we listen and respond to our calls, whether at work or at home, in our relationships or in service. Callings is a compassionate guide to discovering your own callings and negotiating the tight passages to personal power and authenticity.
Author: Theagarten Lingham-Soliar
Publisher: Springer
ISBN: 9783662460047
Category : Science
Languages : en
Pages : 348
Get Book Here
Book Description
The emphasis in this volume is on the structure and functional design of the integument. The book starts with a brief introduction to some basic principles of physics (mechanics) including Newton’s Three Laws of Motion. These principles are subsequently used to interpret the problems animals encounter in motion. It is in only the last 40 or so years that we have begun to understand how important a role the integument plays in the locomotion of many marine vertebrates. This involves the crossed-fiber architecture, which was first discovered in a classic study on nemertean worms. As a design principle we see that the crossed-fiber architecture is ubiquitous in nature. Research on some of the most dynamic marine vertebrates of the oceans – tuna, dolphins and sharks, and the extinct Jurassic ichthyosaurs – shows precisely how the crossed-fiber architecture contributes to high-speed swimming and (in lamnid sharks) may even aid in energy conservation. However, this design principle is not restricted to animals in the marine biota but is also found as far afield as the dinosaurs and, most recently, has been revealed as a major part of the microstructure of the most complex derivative of the integument, the feather. We see that a variety of phylogenetically diverse vertebrates take to the air by using skin flaps to glide from tree to tree or to the ground, and present detailed descriptions of innovations developed in pursuit of improved gliding capabilities in both extinct and modern day gliders. But the vertebrate integument had even greater things in store, namely true or flapping flight. Pterosaurs were the first vertebrates to use the integument as a membrane in true flapping flight and these interesting extinct animals are discussed on the basis of past and cutting-edge research , most intriguingly with respect to the structure of the flight membrane. Bats, the only mammals that fly, also employ integumental flight membranes. Classic research on bat flight is reviewed and supplemented with the latest research, which shows the complexities of the wing beat cycle to be significantly different from that of birds, as revealed by particle image velocimetry. The book’s largest chapter is devoted to birds, given that they make up nearly half of the over 22,000 species of tetrapods. The flight apparatus of birds is unique in nature and is described in great detail, with innovative research highlighting the complexity of the flight structures, bird flight patterns, and behavior in a variety of species. This is complimented by new research on the brains of birds, which shows that they are more complex than previously thought. The feather made bird flight possible, and was itself made possible by β-keratin, contributing to what may be a unique biomechanical microstructure in nature, a topic discussed in some depth. A highly polarized subject concerns the origin of birds and of the feather. Alleged fossilized protofeathers (primal simple feathers) are considered on the basis of histological and taphonomic investigative studies in Chapter 6. Finally, in Chapter 7 we discuss the controversies associated with this field of research. Professor Theagarten Lingham-Soliar works at the Nelson Mandela Metropolitan University, Port Elizabeth and is an Honorary Professor of Life Sciences at the University of KwaZulu-Natal.
Author: William Plane Pycraft
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 210
Get Book Here
Book Description
Author: Pamela Swadling
Publisher: Sydney University Press
ISBN: 1743325460
Category : History
Languages : en
Pages : 365
Get Book Here
Book Description
The natural resources of New Guinea and nearby islands have attracted outsiders for at least 5000 years: spices, aromatic woods and barks, resins, plumes, sea slugs, shells and pearls all brought traders from distant markets. Among the most sought-after was the bird of paradise. Their magnificent plumes bedecked the hats of fashion-conscious women in Europe and America, provided regalia for the Kings of Nepal, and decorated the headdresses of Janissaries of the Ottoman Empire. Plumes from Paradise tells the story of this interaction, and of the economic, political, social and cultural consequence for the island's inhabitants. It traces 400 years of economic and political history, culminating in the 'plume boom' of the early part of the 20th century, when an unprecedented number of outsiders flocked to the island's coasts and hinterlands. The story teems with the variety of people involved: New Guineans, Indonesians, Chinese, Europeans, hunters, traders, natural historians and their collectors, officials, missionaries, planters, miners, adventurers of every kind. In the wings were the conservationists, whose efforts brought the slaughter of the plume boom to an end and ushered in an era of comparative isolation for the island that lasted until World War II.
