Very similar to Tadorna, but the bill is straighter and less concave above ; the nail less hooked beneath ; tail short, rounded, -of 14 feathers. The sexes are slightly different. Four species are recognized, of which one is Indian,
The Fauna Of British India, Including Ceylon And Burma-birds
Blanford, William Thomas, ed. The Fauna of British India: Including Ceylon and Burma. Vol. 4. 1898.
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