This book is an indispensable reference for avian practitioners, students of avian medicine, veterinary pathologists, and pathology trainees who are engaged in diagnostic pathology or research on avian diseases. It offers a comprehensive review of the gross and histologic features of the diseases of pet and aviary birds, provides a guide to ancillary diagnostics, presents a context in which to interpret the pathologic findings, and helps to create an understanding of the pathogenesis of the clinical manifestations of disease. The material is organized by system so that the pathologist faced with a diagnostic challenge involving a particular organ can go to the appropriate chapter, rather than having to search through extraneous listings under etiology or by bird species.