This is a genus of Terns distinguished by its stout and long beak and legs, and by its very short tail, only about one-third the length of the wing.
There is only a single species, which is the largest Tern known.
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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