Two subspecies are generally recognized. The nominate form is found in much of continental Asia, while concretus S. Müller, 1845 which is smaller and darker is known from the Malay Peninsula, Java, Sumatra and Borneo. The birds in the Amur region are larger and Swinhoe described a form from northern China as Cuculus michieanus while Walter Norman Koelz described a form fatidicus from northeastern India.
