Otis tetrax Linn., Syst. Nat., 10th ed., i, p. 154 (1758).
The typical form is lighter on the upper plumage, more sandy and more reddish than the Eastern one, as well as being rather larger.
The Fauna Of British India, Including Ceylon And Burma-birds(second Edition)
Baker, EC S (1922–1930) The fauna of British India, including Ceylon and Burma. Second edition. vol.6 1929.
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