Moore was a splitter and did not follow the concept of subspecies for polytypic forms. Hybridization runs rampant in these polytypic and clinal butterflies, confounding molecular phylogenetics studies. Among taxonomists who believe the species is polytypic, two subspecies are generally recognized. In PolyP, generic functions are called "polytypic". Six species are currently recognized, all of them polytypic and closely related. Koklass pheasant is a polytypic species, with nine subspecies recognised so far.