[119]

Cf. Dict. Birds, artt. Duck, Goose, Swan, and the references there given.

[120]

Cat. Birds Brit. Mus. xxvii. 1895.

[121]

Andrews, Ibis, 1897, pp. 344-355.

[122]

Huxley, P.Z.S. 1867, pp. 463-464.

[123]

Travels amongst the Great Andes of the Equator, 1891-92, pp. 200-205.