Salvin, Ibis, 1859, p. 177; Pliny, Hist. Nat. lib. x. cap. 3.
A list of the Diurnal Birds of Prey, 1884, pp. 14-18.
J. H. Gurney, Ibis, 1875, p. 468.
Cf., however, Sharpe, P.Z.S. 1873, pp. 418, 419.
Ogilvie Grant, Ibis, 1897, pp. 214-220.
Salvin, Ibis, 1859, p. 177; Pliny, Hist. Nat. lib. x. cap. 3.
A list of the Diurnal Birds of Prey, 1884, pp. 14-18.
J. H. Gurney, Ibis, 1875, p. 468.
Cf., however, Sharpe, P.Z.S. 1873, pp. 418, 419.
Ogilvie Grant, Ibis, 1897, pp. 214-220.