There are but two nearly allied species in the present genus. One, A. heyi, is found in Arabia, Egypt, and Nubia; the other ranges from the Euphrates to the Indus. Both are of small size, and the sexes differ considerably in plumage. The tail is short, about half as long as the wing, and slightly rounded, of 12 feathers. Wing rounded; 3rd primary usually longest; 1st but little shorter, and about equal to or between 5th and 6th. No spurs.
The Fauna Of British India, Including Ceylon And Burma-birds
Blanford, William Thomas, ed. The Fauna of British India: Including Ceylon and Burma. Vol. 4. 1898.
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