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23 Free Zoology Books [PDF]

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Zoology is the scientific study of animals, and these free zoology books in PDF cover it from sponges and insects to reptiles and mammals. They follow the same path as a university course.

Start with the textbooks to learn animal classification and taxonomy, then move to the group you need. Classic works by naturalists like David Starr Jordan sit next to modern open textbooks.

Lab manuals for dissection and specimen work close the collection. Every book opens in your browser and downloads in one click, with no sign-up.

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Zoology Textbooks

Start here for the full picture of the animal kingdom. These zoology textbooks cover cells, genetics, animal physiology and evolution, the same ground an intro course covers.

  • Concepts of Zoology: Hawaii Edition

    An open college textbook that takes you from cells, genetics and evolution to animal diversity, body systems and ecology, with review questions at the end of every chapter. Hawaii's endemic species are used as examples throughout.

    Alyssa MacDonald and Anuschka Faucci

    Format: PDF 1450 pages 17.14 MB
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  • Outlines of Zoology

    A complete university zoology manual that goes phylum by phylum, from protozoa and sponges to birds and mammals, with 320 illustrations. Use it alongside lectures or lab work to see how each animal group is built and how it lives.

    J. Arthur Thomson

    Format: PDF 887 pages 28.83 MB
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  • Zoology - Generic Elective

    A university course in 12 units covering cell types, DNA, cell division, taxonomy and zoological nomenclature, the origin of life, ecology, biodiversity, immunity and lab instruments. Each unit ends with self-assessment questions.

    Uttarakhand Open University

    Format: PDF 240 pages 3.05 MB
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  • Animal Life: A First Book of Zoology

    A clear first book of zoology that explains how animals feed, grow, reproduce and adapt to their surroundings. A good starting point if you are new to the subject.

    David Starr Jordan and Vernon L. Kellogg

    Format: PDF 359 pages 17.04 MB
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  • A Manual of Zoology

    The classroom edition of a landmark zoology text, organized group by group with detailed anatomy and clear illustrations. Read it to understand how each major animal phylum is structured.

    T. Jeffery Parker and William A. Haswell

    Format: PDF 601 pages 16.85 MB
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  • Developmental Biology & Applied Zoology

    Follow an animal from gametes and fertilization through cleavage and gastrulation, then see how zoology is applied in aquaculture, sericulture, beekeeping, lac culture, poultry farming and pest management.

    Uttarakhand Open University

    Format: PDF 383 pages 6.36 MB
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Invertebrate Zoology Books

Most animal species on Earth have no backbone. These invertebrate zoology books cover sponges, worms, mollusks, arthropods and echinoderms, the core of every non-chordate course.

  • Non-Chordata

    The full first-year non-chordate syllabus, from protozoa and sponges to cnidarians, worms, arthropods, mollusks and echinoderms, each phylum built around a type animal. A lab course at the end shows you how to prepare and study specimens.

    Uttarakhand Open University

    Format: PDF 525 pages 13.4 MB
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  • Structure and Functions of Invertebrates

    Go beyond classification and see how invertebrates actually work: body plans, locomotion, feeding, respiration, excretion, nervous systems and larval forms across the phyla. A master's level text with progress checks in every unit.

    K. Venkatramalingam

    Format: PDF 263 pages 6.96 MB
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  • Zoology of the Invertebrata

    A classic Cambridge textbook that takes you group by group through the invertebrates, describing one example of each major group and then the most interesting variations around it.

    Arthur Everett Shipley

    Format: PDF 473 pages 26.55 MB
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  • The Life of Crustacea

    Meet crabs, lobsters, shrimps and their relatives through their habits and ways of life, from the seashore and the deep sea to fresh water and dry land. Includes 32 plates and 85 figures.

    William Thomas Calman

    Format: PDF 385 pages 17.26 MB
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Vertebrate Zoology Books

From lampreys and fishes to birds and mammals, vertebrates are the animals we know best. These zoology books cover chordate classification plus fishes, reptiles and mammals in depth.

  • Chordata

    Work through every chordate group, from Balanoglossus and Amphioxus to fishes, amphibians, reptiles, birds and mammals, with classification down to order and one type study per class. Each unit closes with self-check questions.

    Uttarakhand Open University

    Format: PDF 280 pages 8.73 MB
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  • A Text-Book of Vertebrate Zoology

    A classic college text that explains how vertebrates are built through their embryology, then walks you through their classification, living and fossil groups alike, from lampreys and fishes to birds and mammals.

    J. S. Kingsley

    Format: PDF 467 pages 17 MB
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  • A Guide to the Study of Fishes, Volume 1

    Written by one of the founders of ichthyology, this volume covers how fishes are built, how they live and spread across the world's waters, and how lancelets, lampreys and sharks are classified.

    David Starr Jordan

    Format: PDF 671 pages 29.4 MB
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  • Reptiles of the World

    Meet the turtles, crocodilians, lizards and snakes of both hemispheres, order by order, with nearly 200 photographs taken by the curator of reptiles at the Bronx Zoo.

    Raymond L. Ditmars

    Format: PDF 503 pages 20.73 MB
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  • The Life of Animals: The Mammals

    Tour the mammal world order by order, from bats, shrews and carnivores to hoofed animals, whales, elephants and sloths, in a natural history reviewed by museum curators. Includes 15 color plates.

    Ernest Ingersoll

    Format: PDF 617 pages 21.39 MB
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Entomology Books

Insects are the largest group of animals on Earth, and entomology is the science that studies them. These books explain how insects are built, how to identify them and how to collect them.

  • Insect Science

    Learn how insects are built and how they live, from the cuticle, moulting and senses to a full tour of every insect order. A modern university course with color photos and review questions for each topic.

    Gurion Ang and Kathryn Ebert

    Format: PDF 240 pages 16.88 MB
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  • A Manual for the Study of Insects

    Identify insects down to order and family with the analytical keys that made this Cornell manual a classic for generations of students. It also covers insect anatomy, classification and the habits of each group.

    John Henry Comstock, Anna Botsford Comstock and Glenn W. Herrick

    Format: PDF 429 pages 29.76 MB
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  • Entomology Lab Manual

    Nine weeks of hands-on entomology labs, from collecting and pinning specimens to external anatomy, the major insect orders, pests, predators and soil insects. Each week pairs a short reading with a practical assignment.

    Melissa Scherr and Gail Langellotto

    Format: PDF 135 pages 9.92 MB
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  • The Butterfly Book

    Put a name to the butterflies of North America with this classic guide and its 48 color plates of real specimens. It also explains butterfly anatomy, life cycles and how to collect and preserve them.

    William Jacob Holland

    Format: PDF 601 pages 30.35 MB
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Practical Zoology Books

Zoology is also learned at the lab bench. These practical zoology manuals guide you through dissection, slide work and specimen identification, step by step.

  • Practical Zoology: Non-Chordata and Experimental Zoology

    Work through slides and museum specimens one phylum at a time, from Amoeba and sponges to starfish. It also covers live protozoa, minor dissections, permanent slide preparation, mitosis and meiosis, and Drosophila genetics.

    Uttarakhand Open University

    Format: PDF 453 pages 7.57 MB
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  • A Junior Course of Practical Zoology

    A classic dissection guide that walks you, animal by animal, from Amoeba to the frog and the rabbit. Each chapter has step-by-step instructions and detailed drawings.

    Arthur Milnes Marshall and Charles Herbert Hurst

    Format: PDF 569 pages 27.73 MB
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  • A Laboratory Manual for Elementary Zoology

    The lab manual Libbie Hyman wrote for her University of Chicago course. It guides you through frog anatomy, protozoa, embryology and invertebrate dissections, with clear instructions for your drawings.

    Libbie Henrietta Hyman

    Format: PDF 177 pages 13.24 MB
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  • General Zoology Laboratory Manual

    A modern lab manual with six exercises: classification with Caminalcules, planarian regeneration, invertebrates, chordates, fetal pig and pigeon dissection, and mammal skulls and tracks. It ends with a guide to building your own animal collection.

    Kimberly Subacz and Jason Christian

    Format: PDF 33 pages 21.64 MB
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These zoology books take you from your first course to the lab bench. Come back whenever you need a new animal group to study.

Looking for more? Explore our full collection of animal books in PDF.

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