Euler, J. f. O. 1867, p. 411.
Cf. Shelley, Ibis, 1886, pp. 301-359; 1887, pp. 1-47.
For a full account of the tail-feathers of these remarkable birds, see Strickland, Contrib. Ornith. 1850, pp. 88, 149; A. Newton, Dict. Birds, 1896, p. 1030.
Cat. Birds Brit. Mus. xi. 1886, p. 309.
Cassidix oryzivora is parasitic on other forms; Goeldi, Ibis, 1897, p. 364.