This unique work is a visual and practical reference to support the study and interpretation of hematologic findings in animal species of veterinary interest. It provides a structured overview of the fundamental principles of veterinary hematology, combining basic concepts with applied diagnostic guidance. Chapters are equipped with vivid demonstration material, offering pictures and videos of sample collection procedures and blood cells for companion and exotic animals alike.

The volume begins with the identification of primary lymphoid organs and an explanation of hematopoiesis, including the major cellular lineages and their development. It then addresses blood collection techniques in mammals, birds, and reptiles, together with blood film preparation, staining procedures, and basic microscopic evaluation. Subsequent chapters focus on the morphology of red blood cells, white blood cells, platelets, and thrombocytes, emphasizing normal features, relevant morphologic variations, and abnormalities associated with pathologic conditions.

A distinctive feature of this atlas is its comparative scope. It includes images and descriptions from major animal groups as well as selected exotic species, thereby allowing readers to recognize interspecies similarities and differences in cellular morphology. This comparative approach is intended to strengthen diagnostic interpretation and to support a more accurate evaluation of hematologic samples in veterinary practice.

This book has been prepared for students of veterinary medicine and animal science, veterinary clinicians, clinical laboratorians, and other professionals interested in veterinary hematology. It can be used as a teaching resource in undergraduate training, as a study aid in laboratory courses, and as a reference tool in clinical and diagnostic settings. Videos can also be played from the print book using the free Springer Nature More Media App.

Dr. Elena Franco Robles is a Professor in the Department of Veterinary and Animal Science, Division of Life Sciences, Irapuato-Salamanca Campus, at the University of Guanajuato, Mexico, where she also leads the Veterinary Clinical Diagnostic Laboratory. She teaches in the undergraduate program in Veterinary Medicine and Animal Science, as well as in master's and doctoral graduate programs.

Dr. Franco Robles holds a Doctorate in Medical Sciences and a Master's degree in Medical Sciences from the University of Guanajuato, and a Bachelor's degree in Pharmaceutical Biological Chemistry from the same institution. She completed a two-year postdoctoral fellowship in Biochemistry and Biotechnology at the Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV), Mexico.

Her research focuses on biotics applied to One Health, veterinary clinical diagnosis, pathogen detection, mucosal immunology, and metabolism in animal models. Her academic work integrates basic and applied research with veterinary clinical laboratory science, with particular emphasis on laboratory diagnosis, hematology, microbiology, and the evaluation of biomarkers relevant to animal health. She has authored and co-authored numerous scientific publications and has contributed to technological and research developments in collaboration with national and international institutions. She has also supervised undergraduate and graduate theses and participated extensively in scientific conferences, academic evaluation, and research training.

She is a Level II member of Mexico's National System of Researchers (SNII) and a Regular Member of the Mexican Academy of Sciences.

Through her teaching, research, and leadership of the Veterinary Clinical Diagnostic Laboratory, Dr. Franco Robles has contributed to the training of students and professionals in veterinary medicine, clinical diagnosis, laboratory sciences, and animal health.