_Motacilla Calliope_ Pallas, Reise durch versch. Prov. russ.
Reichs, 3, 1776, pp. 261, 325, 697. (Type locality, Yenesei.)
_Luscinia calliope calliope_ Hand-list Japanese Birds, rev., 1932,
p. 178 (Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 197
(Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau).
_Geographic range._--Breeds in northeastern Asia. Winters south to
Malaysia. In Micronesia: Palau Islands--Koror.
_Remarks._--The Siberian Rubythroat is considered to be a casual winter
visitor to the Palau Islands.
=Monticola solitaria philippensis= (Müller)