See Yarrell's Brit. Birds, 4th ed., iii. 1882-84, pp. 426-434, and elsewhere.
For the nerves of the bill, see Yarrell's Brit. Birds, 4th ed. iii. 1882-84, pp. 346, 347.
For habits, see Dresser, Birds of Europe, vii. 1871-1881, pp. 635-637.
Wood-Mason. P.Z.S. 1878, pp. 745-751; Gould, Birds of Australia, ii. 1865, p. 275.
Cf. Sharpe, Ibis, 1892, p. 543; but it seems nearer to Turnix (p. [187]).