male indian gray hornbill (ocyceros birostris) sitting on a tree hole : (pix sanjiv shukla)

indian grey hornbill ocyceros birostris common bird family bucerotidae subcontinent arboreal pairs gray feathers horn black dark casque urban areas medium-sized flight wings tail white tip subterminal band red iris eyelashes bill bare skin eye pale reddish foothills himalayas call squealing wing flapping groups eggs tree hollows nest hole sealed small vertical slit male feeds female entrance excreta mud-pellets moults incubate next cavity chicks fruits mollusks scorpions insects birds reptiles dust bathe social activities bill-grappling aerial jousting