Hornbills
a remarkable group of birds confined to Southern Asia and Africa, akin to the kingfishers and the toucans, remarkable for the very large size of the bill, and for an extraordinary horny protuberance by which it is surmounted, nearly as large as the bill itself, and of cellular structure within. The rhinoceros hornbill is almost the size of a turkey, of a black color, except on the lower part of the belly and tip of the tail, which are white. It has a sharp-pointed, slightly curved bill, about 10 inches long, and furnished at the base of the upper mandible with an immense appendage in the form of an inverted HORNE horn. During incubation the female is plastered up in the hollow of a tree and fed by the male through a small aperture left for the purpose. The hornbills are of arboreal habit, and feed on fruits.
MALE HORNBILL FEEDING FEMALE IN NEST HORNBLENDE (-blend), one of the five most abundant simple minerals of which rocks are composed, the others being felspar, quartz, mica, and carbonate of lime. It is closely akin to augite, but the forms of the crystals in the two species are different, and the cleavage parallel to the faces of the oblique prism in hornblende are more strongly marked than the corresponding cleavage in augite.