Vultur barbatus Linn,, Syst. Nat., 10th ed. p. 87 (1758).
Type-locality: Africa, Santa Cruz.
This species has been split up into many races, five of which are accepted by Kirke-Swann *, among which are G. b. hemachalanus, the common Indian Himalayan bird, differing from the typical form in its larger size and from G. 6. grandis of Sout hern Europe in its rather larger size and deeper coloration of the lower parts. Prom G. b. altaicus it differs in being much smaller. This latter form is almost certainly the one straggling into Assam from Tibet and Central Asia.
Key to Subspecies.
A.Smaller; wing, 726 to 815 mm. 755 to 850 mm............... G. b. hemachalanus, p. 26.
B.Larger; wing 830 to 890 mm...............G. b. altaicas, p. 29.