Psophia undulata Jacquin, Beitrage Gesch. Vogel,p. 24, pl. 4 (1784).
The typical form has the feathers of the fore-neck white instead of grey and the upper plumage more coarsely marked with black.
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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