1A common pheasant of the subspecies Phasianus colchicus mongolicus, which has a broken white neck-ring and white wing coverts, native to western Turkestan but introduced with other races into western Europe and elsewhere (also called Kirghiz pheasant).
2US the ring-necked pheasant, Phasianus colchicus torquatus.
Origin
Early 20th century.
Definition of Mongolian pheasant in US English:
Mongolian pheasant
noun
1A common pheasant of the subspecies Phasianus colchicus mongolicus, which has a broken white neck-ring and white wing coverts, native to western Turkestan but introduced with other races into western Europe and elsewhere (also called Kirghiz pheasant).
2US the ring-necked pheasant, Phasianus colchicus torquatus.