The standard work on pet bird diseases presents the complete field of avian medicine in its usual compact form and has been fully revised and updated. The authors address all essential infectious and non-infectious diseases in pet birds, covering symptoms, diagnosis, differential diagnosis, therapy, and prophylaxis. They provide guidance on diagnostics as well as behavior and behavioral disorders. Information on zoonoses and animal health regulations completes the presentation of the disease profiles. The detailed medication appendix is up-to-date and serves as an important reference for any avian practice. Thus, the 4th edition remains the standard textbook in veterinary medicine studies and a competent reference work for practice at the same time.