The Indian grey hornbill (Ocyceros birostris), also known as the Grey Hornbill or Common Grey hornbill, is common 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.