This field guide is divided into two large sections -- one devoted to minerals and one to rocks, each prefaced by a comprehensive introduction that discusses formation, chemistry, and more. All 377 entries, beautifully illustrated with color photographs and helpful visual symbols, provide descriptions and practical information about appearance, classification, rarity, crystal formation, mode of occurrence, gravity of mineral, rock chemistry, modal classification fields, formational environments, grain sizes of rocks, and much more. Whether you are a serious collector or an information-seeking amateur, this incomparably beautiful, authoritative guide will prove an invaluable reference.

    Now in its 4th Edition, revisions include 250 updated range maps, and new classification information National Geographic is reissuing the Field Guide to the Birds of North America in the 4th edition, focusing on its accuracy and easy use in the field. This is the ultimate birders field guide - sturdy, easy to carry and use, and featuring the most complete information among bird guides. It features all species known to breed in North America, including those that are regular visitors to our continent or that drop in occasionally - more than 800 in all. The edition is lavishly illustrated with specially commissioned full-colour illustrations, plus newly updated range maps and detailed descriptions. A superb new index allows birders in the field to quickly identify a species.

    "The Birder's Bible" for over sixty years. All the birds of eastern and central North America--including accidentals, exotics, and escapes--shown in full color and described in detail. 390 complete, easy-to-read range maps showing summer and winter ranges, breeding grounds, and other special range information. Easy-to-use facing-page format.

    More than 2,000 stunning images show these trees in their natural habitats. Other features include: a unique identification tip for each tree; range maps showing distribution in North America; How to Identify a Tree section; a detailed glossary of tree parts and leaf, fruit, flower, and bark types; essays on ecology, conservation, and North America’s important forest types; plus a complex species and quick-flip indexes. The guide’s unique waterproof cover makes it especially valuable for use in the field.

    The descriptive text includes information on size, geological period, geographical distribution, and ecology of the animal or plant before it was fossilized. In addition, the book provides lists of Geological Survey offices and major fossil collections, a geological time chart, and a guide to collecting and preserving fossils.

    Includes a poster of Theodore Gray's iconic photographic periodic table of the elements! Based on seven years of research and photography by Theodore Gray and Nick Mann, The Elements presents the most complete and visually arresting representation available to the naked eye of every atom in the universe. Organized sequentially by atomic number, every element is represented by a big beautiful photograph that most closely represents it in its purest form. Several additional photographs show each element in slightly altered forms or as used in various practical ways. Also included are fascinating stories of the elements, as well as data on the properties of each, including atomic number, atomic symbol, atomic weight, density, atomic radius, as well as scales for electron filling order, state of matter, and an atomic emission spectrum. This of solid science and stunning artistic photographs is the perfect gift book for every sentient creature in the universe.

    Each entry has a full color illustration as well as color-coded bands that provide at-a-glance facts for quick reference. Easy to use and beautiful to look at, this series is an invaluable resource for every collector.

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    All 933 identification pictures are full-color photos of significant details of virtually all native trees and many cultivated species as you see them in their natural habitat.

    Also discusses meteors, comets, eclipses, and other celestial objects.

    Using a series of his awe-inspiring images, photographer and scientist John Day--who has a Ph.D. in cloud physics and is known round the world as "The Cloudman"--introduces us to earth's great skyscape. His spectacular portfolio of pictures captures a variety of cloud forms and shapes, ranging from cottony-soft cumulus clouds to frightening, whirling funnels, as well as a number of optical effects, such as coronas and halos, seen in the heavens above. A magnificent cloud chart; an explanation of clouds formation; hints on forecasting, observing, and photographing clouds; and his "Ten Reasons to Look Up" teach us to use our inner eye to really perceive those familiar fleeting forms.

    There's no need to look through dozens of photos of birds that don't live in Pennsylvania. This book features 117 species of Pennsylvania birds, organized by color for ease of use. Do you see a yellow bird and don't know what it is? Go to the yellow section to find out. Fact-filled information, a compare feature, range maps and detailed photographs help to ensure that you positively identify the birds that you see.

    Packed with photographs and details on characteristics, distinguishing features, and more, Smithsonian Handbooks: Rocks and Minerals makes identification easy.Designed for beginning and experienced collectors alike, this guide explains what rocks and minerals are, how they are classified, and how to start a collection. Look up different rocks and minerals, and find clear, annotated photography to pick out the key distinguishing features. Learn the differences between igneous, metamorphic, and sedimentary rocks, and reference the glossary for many more technical and scientific terms.Smithsonian Handbooks: Rocks and Minerals is filled with information about characteristics, colors, unique attributes, and more, making it one of the clearest identification guides for rock and mineral enthusiasts.

    Accompanying range maps; overhead flight silhouettes; and sections on bird-watching, accidental species, and endangered birds make the National Audubon Society's Field Guide to North American Birds the most comprehensive available.Note: The Western Edition covers the Rocky Mountain range and all the states to the west of it, while the Eastern Edition generally covers states east of the Rocky Mountains.

    Experienced birders use the most easily observed and consistent characteristics--size, shape, behavior, probability, and general color patterns. The book's 101 scenes--including thirty-five double-page layouts--provide a complete picture of how these features are all related. Even the effects of lighting and other real-world conditions are illustrated and explained. Detailed and succinct accounts from two of North America's foremost raptor experts, Jerry Liguori and Brian Sullivan, stress the key identification features. This complete picture allows everyone from beginner to expert to understand and enjoy what he or she sees in the field. The mystique of bird identification is eliminated, allowing even novice birders to identify raptors quickly and simply.Comprehensive and authoritative, the book covers all thirty-four of North America's diurnal raptor species (all species except owls). Each species is featured in stunning color plates that show males and females, in a full spectrum of ages and color variants, depicted near and far, in flight and at rest, and from multiple angles, all caught in their typical habitats. There are also comparative, multispecies scenes and mystery photographs that allow readers to test their identification skills, along with answers and full explanations in the back of the book. In addition, the book features an introduction, and thirty-four color maps accompany the plates.Whether you are a novice or an expert, this one-of-a-kind guide will show you an entirely new way to look at these spectacular birds.The most complete guide to North American raptors, written by some of the foremost experts The first raptor guide using Richard Crossley's acclaimed, innovative composite images that show birds as they actually appear in the field 101 stunning color plates--including thirty-five double-page layouts--composed from thousands of photographs Comparative, multispecies plates and photos of mystery species that allow readers to test their growing identification skills Complete with introduction, 34 color maps, and detailed species accounts