The Indian grey hornbill (Ocyceros birostris) is a common hornbill found on the Indian subcontinent. It is mostly arboreal and is commonly sighted in pairs. It has grey feathers all over the body with a light grey or dull white belly. The horn is black or dark grey with a casque extending to the point of curvature of the horn. The tail has a white tip and a dark sub-terminal band. They have a red iris and the eyelids have eyelashes. The bare skin around the eye is dark in the male while it is sometimes pale reddish in females. The female has a more yellowish bill with black on the basal half and on the casque. Male has a larger casque on a dark bill.