Rhinoceros hornbill

he rhinoceros hornbill (Buceros rhinoceros) is one of the largest hornbills, adults being approximately the size of a swan,[2] 91–122 cm (36–48 in)[3] long and weighing 2–3 kg (4.4–6.6 lb). In captivity it can live for up to 90 years.

Like most other hornbills, the male has orange or red irises, and the female has whitish irises. This bird has a mainly white beak and casque, but there are orange places here and there. The tip of the casque curves markedly upward. The bird has white underparts, especially to the tail.

The courtship and bonding of these birds are critical, as the female must trust the male to provide her with everything when she is incubating and raising chicks. These hornbills make their nests inside tree trunks, and the female stays inside with the eggs and then with the chicks, while the male brings them food. After the eggs are laid, the male collects mud, and the pair pack that mud, along with food and feces, to wall up the entrance to the tree cavity. They leave a very small hole, just large enough for the male to feed the female, and later the chicks, and for the female to defecate through the hole. Once the chicks are fully feathered and old enough to leave the nest, the parents chip away the dry mud to let the chicks out.

The rhinoceros hornbill eats fruit, insects, small reptiles, rodents and smaller birds.