Mercer Caleb W (147 results)

Taschenbuch. Condition: Neu. Neuware - Descend into a world of darkness, crushing pressure, extreme cold, and some of the most extraordinary life forms on Earth.Far below the sunlit surface, the ocean becomes a very different environment. Food can be scarce, pressure rises dramatically, sunlight disappears, and survival demands remarkable adaptations. Yet even in these seemingly hostile conditions, an astonishing variety of animals continues to thrive.Amazing Creatures of the Deep Sea introduces readers to the fascinating organisms that inhabit the ocean's darkest regions and explains the biology that allows them to survive where few other forms of life could.Meet the Animals of the DeepExplore bizarre fish, glowing invertebrates, transparent hunters, gelatinous drifters, enormous crustaceans, specialized predators, and other organisms shaped by millions of years of evolution in extreme environments.Inside You'll Discover: - How ocean depth changes temperature, pressure, light, and available food- Why many deep-sea animals produce their own light- How bioluminescence can help with hunting, camouflage, defense, and communication- Why some species have enormous mouths, expandable stomachs, or unusually large teeth- How animals survive under extreme water pressure- Why transparent and dark-colored bodies are common at depth- How deep-sea creatures find food in environments where meals may be rare- What happens around hydrothermal vents and cold seeps- How scientists explore environments humans cannot easily reach- What remotely operated vehicles and submersibles reveal about hidden marine life- Why new deep-ocean species continue to be documented- How human activities may affect ecosystems far below the surfaceUnderstand the Science Behind Their Strange AppearanceDeep-sea animals may look bizarre by human standards, but their unusual bodies often make perfect sense in the environments where they live. Oversized jaws, reduced eyes, light-producing organs, slow metabolisms, sensitive sensory systems, and unusual feeding strategies can all provide advantages in darkness and scarcity.Explore the Ocean's Great Depth ZonesLearn how marine environments change as you travel from dim midwater regions into deeper bathyal, abyssal, and hadal zones. Each level presents different challenges and supports distinctive communities of life.See How Scientists Explore an Almost Inaccessible WorldMuch of the deep ocean remains difficult to study. Modern researchers use sonar, cameras, remotely operated vehicles, crewed submersibles, environmental sampling, and other technologies to document animals that may never naturally encounter the surface.Perfect for wildlife enthusiasts, students, ocean lovers, and curious readers, this book offers an engaging journey into one of the least familiar and most extraordinary environments on our planet.…

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware - Turn an ordinary summer evening into a fascinating exploration of one of nature's most enchanting insects.When tiny flashes begin appearing over lawns, gardens, woodland edges, and fields after sunset, an extraordinary natural display is underway. Fireflies are more than beautiful points of light. They are beetles with complex life cycles, specialized habitats, distinctive signaling behavior, and important connections to the environments around them.Backyard Fireflies gives beginning nature enthusiasts an accessible introduction to finding, observing, and appreciating these remarkable insects while creating outdoor spaces that better support them.Discover the Lives Behind the LightsLearn how fireflies develop from egg to larva, pupa, and adult, why different stages of their lives can have very different needs, and how bioluminescence plays a fascinating role in their biology.Inside You'll Discover: - What fireflies are and where they fit within the beetle family tree- How their extraordinary light-producing ability works- Why different kinds may produce different flashing displays- How to recognize promising places to look for them- When weather, season, and time of evening can influence activity- How to observe flashing displays without unnecessary disturbance- What larvae do before becoming familiar flying adults- Why soil, leaf litter, moisture, and vegetation can matter- How artificial nighttime lighting may affect their environment- Ways to make gardens and yards more wildlife-friendly- How to record sightings and notice changes from season to season- Simple ways families and nature enthusiasts can enjoy responsible nighttime observationCreate a More Firefly-Friendly Outdoor SpaceSupporting these insects is not simply about attracting more adults for a few summer evenings. Their earlier life stages also depend on suitable environmental conditions. Learn how vegetation, moisture, leaf litter, reduced disturbance, thoughtful outdoor lighting, and careful landscape management can contribute to better habitat.Become a More Skilled Nighttime ObserverYou do not need complicated equipment to begin. With patience and careful attention, you can learn to notice where flashes occur, when activity begins, how displays change through the evening, and which environmental conditions seem to coincide with the greatest activity.Bring Natural History Into Your Own YardFirefly watching offers an approachable way to experience wildlife close to home. Each evening provides an opportunity to slow down, observe carefully, keep records, and develop a deeper appreciation for the small creatures sharing your surroundings.Perfect for beginning naturalists, gardeners, families, wildlife enthusiasts, and anyone captivated by summer's glowing insects, Backyard Fireflies turns nighttime observation into a rewarding journey of discovery.…

Taschenbuch. Condition: Neu. Neuware - You spot a large black bird overhead. Is it a crow-or a raven At first glance, crows and ravens can look remarkably similar. Both are intelligent, adaptable members of the corvid family, and both can appear almost entirely black from a distance. But once you know which clues to examine, separating them becomes much easier.Crow or Raven gives you a practical identification system for distinguishing these fascinating birds using multiple clues rather than relying on a single feature.Learn What to Look ForInstead of depending only on size or color, you will learn to examine overall proportions, bill shape, throat feathers, tail shape, wing structure, vocalizations, movement, surroundings, and social patterns. Combining these clues can make identification more reliable in real-world conditions.Inside You'll Discover: - How to compare overall size, shape, and proportions- How bill structure can provide useful clues- How throat feathering differs between typical adults- How tail shape can help when birds are overhead- How wing shape and wingbeats differ in the air- How soaring and other aerial movements can provide clues- How to listen for characteristic vocal differences- How posture and movement can assist recognition- How social groupings may provide supporting evidence- How surroundings and geographic range can narrow the possibilities- How age, distance, lighting, and viewing angle can make recognition harder- How to avoid common identification mistakes- How to distinguish direct evidence from assumptions- How to combine several clues before reaching an identification- How to photograph useful features for later comparison- How to record sightings and improve through repeated practiceRecognize Them in FlightSometimes your best view lasts only a few seconds. Learn to pay attention to silhouette, tail profile, wing shape, wingbeats, gliding, soaring, and other aerial clues that can help you make better use of brief encounters.Listen Before You LookYou may hear these birds before you see them. Becoming familiar with differences in voice, tone, rhythm, and calling patterns can provide valuable information, especially when the bird is distant or partially hidden.Understand the Birds Behind the IdentificationIdentification becomes easier when you understand how these birds live. Explore social relationships, communication, learning, problem-solving, foraging, movement, and interactions with their surroundings while keeping the central focus on practical recognition.Perfect for beginning birdwatchers, backyard naturalists, hikers, photographers, and anyone who has ever looked at a black bird and wondered which one they were seeing, this handbook turns crow-versus-raven identification into a practical skill you can continue improving in the field.…

Taschenbuch. Condition: Neu. Neuware - Meet remarkable species whose evolutionary stories reach far back into the history of life on Earth.Horseshoe crabs, coelacanths, tuatara, nautiluses, lungfish, and other unusual organisms are often described as 'living fossils.' Their distant relatives appear in the fossil record millions of years ago, and some retain features that provide fascinating glimpses into the evolutionary past.Nature's Living Fossils explores these extraordinary survivors, the environments that shaped them, and the scientific discoveries that help researchers reconstruct their long histories.Journey Across Millions of Years of EvolutionDiscover how certain lineages endured dramatic changes in climate, shifting continents, changing ecosystems, mass extinctions, and the rise and disappearance of countless other forms of life.Inside You'll Discover: - What scientists actually mean when they use the term 'living fossil'- Why surviving members of very old lineages are not literally unchanged from their ancestors- How fossils reveal the evolutionary histories of modern species- Why horseshoe crabs have attracted scientific interest for generations- How the discovery of living coelacanths surprised twentieth-century zoologists- What makes the tuatara such an unusual modern reptile- How nautiluses differ from many other modern cephalopods- Why lungfish are important to understanding vertebrate evolution- How ancient-looking body plans can remain effective in modern environments- Why long-term evolutionary success does not mean evolution has stopped- How genetics has changed scientists' understanding of old lineages- Why several remarkable survivors now face modern conservation pressuresSeparate Popular Myth From Evolutionary RealityThe phrase 'living fossil' can easily create the impression that a species has remained completely unchanged for millions of years. Evolution does not work that way. Every modern species has continued evolving, even when some aspects of its anatomy resemble those seen in distant fossil relatives.Discover the Stories Behind Famous SurvivorsSome lineages persisted in relatively stable environments. Others survived enormous ecological changes. Their histories demonstrate that survival depends not simply on being old, but on possessing traits that continue to function under changing conditions.Connect Fossils With Life TodayPaleontology, anatomy, genetics, ecology, and evolutionary biology all contribute pieces to these remarkable stories. By comparing fossils with living organisms, scientists can better understand both the similarities and the enormous changes that have taken place across geological history.Perfect for wildlife enthusiasts, fossil lovers, students, natural-history readers, and anyone fascinated by evolution, this book offers an accessible journey through some of the oldest surviving branches on the tree of life.…

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware - Create a safer, healthier feeding space for wild birds while learning how to support them through changing seasons.Feeding birds can bring color, movement, and life closer to home, but doing it well involves more than simply filling a feeder. Food quality, feeder placement, cleanliness, predators, disease risks, seasonal needs, and natural food sources all play an important role in creating a responsible feeding routine.The Responsible Backyard Bird Feeding Guide shows you how to make thoughtful choices that support visiting birds while reducing common problems around feeding stations.Build a Better Feeding RoutineLearn how to choose suitable foods, place feeders wisely, keep equipment clean, manage waste, and observe which species visit your space. You will also discover how natural vegetation, water, shelter, and seasonal changes can influence feeding activity.Inside You'll Discover: - How different birds use seeds, fruits, insects, suet, nectar, and other food sources- How feeder design can influence which species visit- Why regular cleaning is important around feeding stations- How spilled food and overcrowding can create problems- How to reduce risks from predators and window collisions- How to recognize when a feeding area needs adjustment- How seasonal changes affect natural food availability- How winter conditions can influence feeding activity- Why native plants can provide valuable natural resources- How water, shelter, and vegetation complement supplemental food- How to manage squirrels and other visitors without harming wildlife- How to observe birds without disturbing normal activity- How to maintain a cleaner and more sustainable feeding stationThink Beyond the FeederA bird-friendly outdoor space is not built around food alone. Trees, shrubs, native plants, insects, clean water, nesting opportunities, and protective cover can all contribute to a healthier environment. This book helps you combine supplemental feeding with broader habitat support.Adapt Through the YearThe birds visiting your property may change with migration, breeding activity, weather, and food availability. Learning to adjust your feeding routine through the year can help you respond more thoughtfully to those changes.Feed With Wildlife Welfare in MindResponsible feeding means paying attention to more than the number of birds at a feeder. Clean equipment, fresh food, appropriate placement, reduced crowding, and careful observation can all help create a safer experience for the birds you enjoy watching.Perfect for beginning bird enthusiasts, backyard naturalists, families, and anyone who wants to support wild birds more thoughtfully, this practical handbook provides a clear foundation for creating a cleaner, safer, and more nature-friendly feeding space. …

Taschenbuch. Condition: Neu. Neuware - Journey into the hidden world of some of the planet's rarest and most extraordinary spiders.From isolated islands and ancient forests to caves, deserts, mountains, and tiny fragments of surviving habitat, some spiders exist in remarkably restricted environments. Others are so elusive that scientists have documented them only a handful of times, leaving fascinating questions about their biology, distribution, and future.The World's Rarest Spiders introduces readers to exceptional arachnids from around the globe and explores the unusual adaptations, environments, scientific discoveries, and conservation challenges that make them so fascinating.Meet Spiders Few People Will Ever SeeDiscover species with extremely limited ranges, unusual body forms, specialized hunting strategies, remarkable camouflage, and lifestyles shaped by some of the planet's most distinctive environments.Inside You'll Discover: - Why some spider populations occur only in extremely small geographic areas- How islands, caves, forests, mountains, and other specialized environments can produce unique arachnid communities- How scientists identify and classify poorly known species- Why some spiders can remain undocumented for generations- How camouflage and specialized behavior help elusive species survive- How researchers search for tiny animals in difficult environments- Why museum specimens can reveal overlooked biological information- How habitat destruction can threaten highly localized populations- Why rarity can be difficult to measure accurately- How field surveys and modern technology improve scientific knowledge- What rediscoveries can reveal about species once feared lost- Why protecting small habitats can preserve unique forms of lifeUnderstand What 'Rare' Really MeansA spider may appear rare because it genuinely has a tiny population, because it occupies a restricted range, or simply because scientists have not surveyed its environment thoroughly. This book explores these differences and explains why limited records do not always prove that a species is close to extinction.Explore the Science Behind the SearchStudying elusive arachnids requires careful investigation. Researchers may examine anatomy, webs, behavior, geographic distribution, genetic evidence, historical collections, and environmental conditions to understand where a species belongs and how secure its population may be.Discover Why Small Creatures Deserve AttentionRare spiders may occupy only a tiny corner of the planet, but they are part of larger ecological communities. Their stories reveal the extraordinary diversity of arachnid life and demonstrate how much remains to be learned about even relatively familiar groups of animals.Perfect for spider enthusiasts, wildlife readers, naturalists, students, and anyone fascinated by unusual animals, this book offers an engaging journey into the remarkable lives of arachnids encountered in some of the world's least expected environments.…

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Taschenbuch. Condition: Neu. Neuware.

Paperback. Condition: new. Paperback. When every request is urgent, nothing is visible. The Shared Queue is a workplace story about a team drowning in scattered requests, private promises, hidden priorities, and the quiet exhaustion of work that has no single line. In the Constraint Room, the problem is not laziness or lack of care. The problem is that work enters from every direction: hallway favors, executive messages, inbox fragments, side channels, and informal obligations. Everyone is busy. Everyone is helpful. And still, the system keeps producing confusion. This short business fable follows a team as they learn to make work visible, place requests into one shared queue, expose trade-offs, and protect execution from invisible overload. Written for operators, founders, managers, and teams who feel the cost of unclear intake, The Shared Queue offers a simple story about workflow, responsibility, prioritization, and the discipline of letting one line tell the truth. This item is printed on demand. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

PAP. Condition: New. New Book. Shipped from UK. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

PAP. Condition: New. New Book. Shipped from UK. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

Paperback. Condition: new. Paperback. From neighborhood feeders and quiet forests to Appalachian ridges, wetlands, lakes, farmland, and river valleys, Pennsylvania offers rewarding birdwatching throughout the year.The state's varied landscapes support an impressive assortment of resident species, breeding visitors, passage migrants, and winter arrivals. Knowing where to look-and which clues to notice-can turn an uncertain sighting into a much more confident identification.The Pennsylvania Birdwatching Field Guide gives beginning and developing birdwatchers a practical introduction to recognizing the birds encountered across the Keystone State while understanding how habitat, appearance, sound, activity, location, and season work together.Learn to Identify More Than a Flash of ColorReliable identification rarely depends on plumage alone. Learn to examine size, silhouette, bill shape, wing and tail patterns, posture, flight style, vocalizations, surroundings, and seasonal timing when narrowing down the possibilities.Inside You'll Discover: How to recognize useful identification featuresHow size, shape, posture, and proportions provide valuable cluesHow bill structure can suggest how a species finds foodHow songs and calls help locate birds hidden by vegetationHow males, females, juveniles, and seasonal plumages may differHow to separate commonly confused speciesWhich groups frequently appear around homes, yards, parks, and feedersWhat to watch for in Pennsylvania's extensive forest habitatsHow wetlands, rivers, lakes, and reservoirs attract different bird communitiesHow Appalachian ridges and higher elevations influence birdlifeWhat agricultural areas and open country can offer birdwatchersHow spring passage changes what you may encounterWhat happens during autumn movementHow winter introduces a different combination of speciesHow habitat can help distinguish similar-looking birdsHow to record sightings and strengthen your observation skillsHow to watch wild birds without unnecessarily disturbing themExplore Pennsylvania Habitat by HabitatBird communities change as the landscape changes. A forested ridge offers different possibilities from a marsh, agricultural field, suburban neighborhood, lake edge, or river corridor. Learning these habitat relationships can make identification faster and birding more rewarding.Experience the Appalachian LandscapePennsylvania's ridges, valleys, forests, and higher elevations create important environments for numerous species. These landscapes can also provide opportunities to observe seasonal movements, particularly when geography and weather concentrate traveling birds.Follow the Annual CycleSpring brings returning breeders and passage migrants. Summer highlights nesting and family activity. Autumn introduces another major period of movement, while winter changes the mix once again. Understanding this annual rhythm helps you know which possibilities to consider during every outing.Build Your Skills One Sighting at a TimeYou do not need to memorize every species before heading outside. By learning to combine appearance, sound, movement, surroundings, geographic location, and timing, you can steadily become a more observant and confident birder.Whether you are watching a feeder from your window, walking through a woodland, exploring an Appalachian trail, visiting a wetland, scanning a reservoir, or searching open countryside, this accessible reference helps you discover the remarkable birdlife found throughout Pennsylvania. This item is printed on demand. Shipping may be from multiple locations in the US or from the UK, depending on stock availability. …

PAP. Condition: New. New Book. Shipped from UK. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

Condition: New. Print on Demand.

PAP. Condition: New. New Book. Delivered from our UK warehouse in 4 to 14 business days. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

Paperback. Condition: new. Paperback. You spot a large black bird overhead. Is it a crow-or a raven?At first glance, crows and ravens can look remarkably similar. Both are intelligent, adaptable members of the corvid family, and both can appear almost entirely black from a distance. But once you know which clues to examine, separating them becomes much easier.Crow or Raven? gives you a practical identification system for distinguishing these fascinating birds using multiple clues rather than relying on a single feature.Learn What to Look ForInstead of depending only on size or color, you will learn to examine overall proportions, bill shape, throat feathers, tail shape, wing structure, vocalizations, movement, surroundings, and social patterns. Combining these clues can make identification more reliable in real-world conditions.Inside You'll Discover: How to compare overall size, shape, and proportionsHow bill structure can provide useful cluesHow throat feathering differs between typical adultsHow tail shape can help when birds are overheadHow wing shape and wingbeats differ in the airHow soaring and other aerial movements can provide cluesHow to listen for characteristic vocal differencesHow posture and movement can assist recognitionHow social groupings may provide supporting evidenceHow surroundings and geographic range can narrow the possibilitiesHow age, distance, lighting, and viewing angle can make recognition harderHow to avoid common identification mistakesHow to distinguish direct evidence from assumptionsHow to combine several clues before reaching an identificationHow to photograph useful features for later comparisonHow to record sightings and improve through repeated practiceRecognize Them in FlightSometimes your best view lasts only a few seconds. Learn to pay attention to silhouette, tail profile, wing shape, wingbeats, gliding, soaring, and other aerial clues that can help you make better use of brief encounters.Listen Before You LookYou may hear these birds before you see them. Becoming familiar with differences in voice, tone, rhythm, and calling patterns can provide valuable information, especially when the bird is distant or partially hidden.Understand the Birds Behind the IdentificationIdentification becomes easier when you understand how these birds live. Explore social relationships, communication, learning, problem-solving, foraging, movement, and interactions with their surroundings while keeping the central focus on practical recognition.Perfect for beginning birdwatchers, backyard naturalists, hikers, photographers, and anyone who has ever looked at a black bird and wondered which one they were seeing, this handbook turns crow-versus-raven identification into a practical skill you can continue improving in the field. This item is printed on demand. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

PAP. Condition: New. New Book. Shipped from UK. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.