Plait-billed, [394]

Hornero, [486]

Horns, [12];

in Auks, [315] f., [317], [318]

Houbara, [260];

H. fuerteventurae, [262] n.;

H. macqueeni, [262];

H. undulata, [262]

Houbaropsis, [260];

H. bengalensis, [262]