Ocyceros is a genus of birds in the family Bucerotidae. Established by Allan Octavian Hume in 1873, it contains the following species, which are limited to the Indian subcontinent. \n* Malabar grey hornbill, Ocyceros griseus \n* Sri Lanka grey hornbill, Ocyceros gingalensis \n* Indian grey hornbill, Ocyceros birostris \n* Indian grey hornbill, Ocyceros birostris at Roorkee in Haridwar District of Uttarakhand, India. \n* Indian grey hornbill, Ocyceros birostris at Roorkee in Haridwar District of Uttarakhand, India. \n* \n* Indian grey hornbill, Ocyceros birostris in Hyderabad, India. \n*