Anorrhinus is a genus of hornbills (family Bucerotidae) found in forests of Southeast Asia (just barely extending into adjacent parts of India and China). 

1/  Tickell's brown hornbill (Anorrhinus tickelli), also known as the rusty-cheeked hornbill
2/ Austen's brown hornbill (Niệc nâu, Anorrhinus austeni) 
Austen's brown hornbill is sometimes considered as a subspecies of Tickell's brown hornbill.

Bucerotiformes, Bucerotidae, Buceros: Latin bucerus horned like an ox (Greek boukeros: horned like an ox: bous ox; keros: horn).
The name Anorrhinus comes from the Greek words ano (ἄνω), meaning "above," and rhis or rhinos (ῥίς/ῥινός), meaning "nose" or "nostril," referring to the genus's upward-oriented nostrils.