Download or read book Checklist of the Vascular Plants of Powdermill Nature Reserve Westmoreland County Pennsylvania written by Frederick H. Utech and published by . This book was released on 1999 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Checklist of the Vascular Plants of Powdermill Nature Reserve Westmoreland County Pennsylvania written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annotated Checklist of the Vascular Plants of Powdermill Nature Reserve Westmoreland County Pennsylvania written by Frederick H. Utech and published by . This book was released on 1984 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Notes on the Distribution of Pennsylvania Plants Based on Specimens in the Carnegie Museum of Natural History Herbarium written by Sue A. Thompson and published by . This book was released on 1989 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Reports written by Carnegie Institute and published by . This book was released on 1985 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes report of the director of fine arts, of the director of the Museum, and of the director of the Technical schools.

Download or read book Ferns and Flowering Plants of Westmoreland County Pennsylvania written by Dorothy L. Pearth and published by . This book was released on 1975 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Checklist of Vascular Plant Species in the Tidbinbilla Nature Reserve written by J. E. Ward and published by . This book was released on 1979 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Check List of the Vascular Flora of Allegheny County Pennsylvania written by LeRoy Kershaw Henry and published by . This book was released on 1980 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Bibliography of Botanical Field Work in Western Pennsylvania written by Charles M. Boardman and published by . This book was released on 1984 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Checklist of Vascular Plant Species in the Tidbinbilla Nature Reserve written by J. E. Ward and published by . This book was released on 1988 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Carnegie Museum of Natural History Annual Report written by Carnegie Museum of Natural History and published by . This book was released on 1999 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Schuylkill Legal Record written by and published by . This book was released on 1918 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The World s Rarest Birds written by Erik Hirschfeld and published by Princeton University Press. This book was released on 2013-03-17 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: An illustrated survey of the world's most endangered birds This illustrated book vividly depicts the most endangered birds in the world and provides the latest information on the threats each species faces and the measures being taken to save them. Today, 571 bird species are classified as critically endangered or endangered, and a further four now exist only in captivity. This landmark book features stunning photographs of 500 of these species—the results of a prestigious international photographic competition organized specifically for this book. It also showcases paintings by acclaimed wildlife artist Tomasz Cofta of the 75 species for which no photos are known to exist. The World's Rarest Birds has introductory chapters that explain the threats to birds, the ways threat categories are applied, and the distinction between threat and rarity. The book is divided into seven regional sections—Europe and the Middle East; Africa and Madagascar; Asia; Australasia; Oceanic Islands; North America, Central America, and the Caribbean; and South America. Each section includes an illustrated directory to the bird species under threat there, and gives a concise description of distribution, status, population, key threats, and conservation needs. This one-of-a-kind book also provides coverage of 62 data-deficient species.

Download or read book Rare Birds of North America written by Steve N. G. Howell and published by Princeton University Press. This book was released on 2014-02-16 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive illustrated guide to North America's vagrant birds Rare Birds of North America is the first comprehensive illustrated guide to the vagrant birds that occur throughout the United States and Canada. Featuring 275 stunning color plates, this book covers 262 species originating from three very different regions—the Old World, the New World tropics, and the world's oceans. It explains the causes of avian vagrancy and breaks down patterns of occurrence by region and season, enabling readers to see where, when, and why each species occurs in North America. Detailed species accounts describe key identification features, taxonomy, age, sex, distribution, and status. Rare Birds of North America provides unparalleled insights into vagrancy and avian migration, and will enrich the birding experience of anyone interested in finding and observing rare birds. Covers 262 species of vagrant birds found in the United States and Canada Features 275 stunning color plates that depict every species Explains patterns of occurrence by region and season Provides an invaluable overview of vagrancy patterns and migration Includes detailed species accounts and cutting-edge identification tips

Download or read book Circannual Rhythms written by Eberhard Gwinner and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: In addition to the more or less static properties of the environ ment, plants and animals must cope with its temporal variations. Among the most conspicuous temporal changes to which organisms are exposed are periodic phenomena generated by the rotation of the earth about its axis, its revolution around the sun, and the more complex movements of the moon in relation to both sun and earth. The first two of these astronomical cycles are basic to the familiar daily and annual rhythms, respectively, in the environment. The third generates somewhat more complex cycles, such as those in moonlight and variations in tides. These environmental cycles have provided challenges and opportunities for organisms to adjust their physiology and behavior to them. Indeed, the predictability inherent to these periodic processes has enabled organisms to evolve innate endogenous rhythmic programs that match the environmental cycles and allow, in a variety of different ways, adjustment of biological activities to the cycles of environmental changes. The endogenous nature of rhythmicity was first clearly recognized in the 1930's in daily periodicities, the most widely distributed and best investigated class of biological rhythms of this type. In the 1950's, demonstrations of endogenous tidal and lunar rhythms, which occur in some littoral and marine organisms, ensued. Another decade passed before endogenous annual periodicities were first demonstrated unambiguously.

Download or read book Control of Bird Migration written by P. Berthold and published by Springer Science & Business Media. This book was released on 1996 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Considers all aspects of research since experimentation began on the subject in 1925

Download or read book Weather and Bird Behaviour written by Norman Elkins and published by A&C Black. This book was released on 2010-01-29 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classic Poyser title, now in its third revised edition, discusses in depth the various ways in which weather conditions influence bird behaviour. Weather conditions affect food and water availability, decisions about when and how to migrate, timing and success of reproduction, flight style, and physical comfort. Birds display many adaptations in form and behaviour that help them to cope with changing weather conditions, and this fascinating book uses a great variety of examples to explore the subject in depth. The text is enhanced throughout with evocative line drawings, there are many useful tables and figures, and there is also an 8pp colour photograph section.