Rhea darwini differs in several well-marked characters from the earlier known R.
darwini have a bluish tinge.
darwini seems to be the proper inhabitant of the country last named, though M.
darwini to be the constant companion of guanacos (Lama huanaco) - just as in Africa the ostrich seeks the society of zebras and antelopes.
Howes, "Notes on the Gular Brood-pouch of Rhinoderma darwini," P.Z.S., 1888, p. 231; W.