SUB-ORDER XIII.
THE STILT-WALKERS (GRALLATORES).
FAMILY I.—THE BUSTARDS (OTIDES), iv., 2.
| Sub-Family | 1.—The True Bustards (Otis) iv., 2; the Great Bustard (O. tarda), iv., 2. |
| " " | 2.—The Little Bustards (Tetrax), iv., 5; the Little Bustard (T. campestris), iv., 5. |
| " " | 3.—The Houbaras (Hubara), iv., 6; the Indian Houbara (H. Macquenii), iv., 6; the African Ruffled Bustard (H. undulata), iv., 8. |
| " " | 4.—The Florikins (Sypheotides), iv., 8; the Bengal Florikin (S. Bengalensis), iv., 8. |
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FAMILY II.—THE COURSERS (TACHYDROMI), iv., 9.
| Sub-Family | 1.—The Desert Coursers (Cursorius), iv., 10; the Cream-coloured Courser (C. isabellinus), iv., 10. |
| " " | 2.—The Crocodile Watchers (Trochilus), iv., 11; the Egyptian Crocodile Watcher (T. Ægyptiacus), iv., 11. |
FAMILY III.—THE PRATINCOLES (TRACHELIÆ), iv., 12.
Sub-Family 1.—The Pratincoles (Glareola), iv., 12; the Collared Pratincole (G. pratincola), iv., 13.