The Naburup (Amydrus Naburup), is a bird about nine inches and two-thirds long; the wing measures five and a quarter inches, and the tail four inches. The colour of the plumage is a dark steel blue, except upon the six first quills, these being reddish brown upon their outer web, light brown upon their inner portion, and blackish brown at their tips; the iris is light red, the beak and feet pale black. The coat of the female resembles that of the male, but she is somewhat smaller. The young are brown, spotted with steel blue. In its habits this species is social and its song agreeable; like its congeners, it builds amongst the rocks of Abyssinia, forming in some cases small settlements, and weaving its nest with so little skill as to permit the eye to penetrate its interior. Both sexes assist in the work of incubation, but beyond this we have no knowledge of their habits.
The ORIOLES (Orioli) constitute a family of beautiful birds, regarded by some ornithologists as allied to the Thrushes, and by others classed with the Birds of Paradise, but to which we venture to assign a position in this place. They are recognisable by their elongate slender bodies, long wings, and tails of moderate size; the feet are short, the toes strong, and armed with powerful claws; the beak is long and conical; both mandibles are rather vaulted, and the upper one terminates in a slight hook. The plumage, which is soft and gay in its colours, varies considerably, according to the age or sex of the bird; and, when destitute of the brilliant gloss by which it is usually distinguished, is still more varied in its hues. Several of the most interesting species of this family inhabit Australia, and none of its members are found beyond the limits of the eastern hemisphere. All may be regarded as tree-birds, though some few spend a considerable portion of their time upon the ground, over which they hop with an extremely heavy, awkward step; amongst the branches, on the contrary, their movements are light and graceful, and their voice is both full and pleasing in its tones. Fruit and insects constitute their principal food. During the period of incubation many species separate entirely from their companions, towards whom they testify considerable animosity and jealousy; but others remain in the company of their associates even at that season of the year. The nests of all are placed upon trees, and are remarkable for the neatness and beauty of their construction.
THE SATIN BOWER BIRD.
The Satin Bower Bird (Ptilonorhynchus holosericus), a recently-discovered inhabitant of Australia, is a very celebrated member of this family. The body of this species is powerful, the wings rounded at the tip; the tail of moderate size, and cut straight at its extremity; the tarsi are high, slender, and the toes short. The beak is strongly formed, the upper mandible arched at the tip over the lower portion, which is also slightly bent. The adult male is truly a splendid creature, with rich satin-like plumage of a deep blue black; the primary quills and the secondaries are of velvety blackness, tipped with blue, as are also the wing and tail feathers; the iris light blue, surrounded by a narrow red ring; the beak is blueish grey, tipped with yellow, and the feet red. The female is green upon the upper parts of the body, and underneath of a yellowish green; the feathers are spotted here and there with brown crescent-shaped spots, that give a scale-like appearance to the lower portion of the bird; the wings and tail are deep yellowish brown. The young resemble the mother.
Gould has made us familiar with the curious habits of the Satin Birds, whose favourite haunts are found amidst the thickly-foliaged "bush" of Australia, and here they may be seen living in pairs throughout the greater part of the year, only quitting their favourite locality when tempted to short distances by the hope of obtaining some particular kind of food. In autumn they usually congregate in small flocks, and seek a home among the bushes that grow upon the banks of neighbouring rivers. Insects sometimes form a portion of their diet; they, however, prefer fruits and grain, and are fond of robbing the gigantic fig-trees of their tempting burden. When engaged in eating, these birds are so extremely shy and cautious as to render their capture almost impossible. One of the oldest members of the party is usually found perched upon the highest branch of some neighbouring tree for the purpose of warning his companions of approaching danger: this he does by a peculiar clear note, which—should the sentinel become excited—is followed by a harsh, guttural cry. Their bowers have been described by the author from whom we quote as most peculiar and beautiful in their construction. From observations made by himself, he tells us that these remarkable erections are generally placed upon the ground, under the shelter of an overhanging tree or bush, in some quiet and retired place, and vary considerably in their size. The walls are strongly formed of twigs and small branches woven together in such a manner as to bring the ends in contact at the top. An opening is left to form an entrance at both extremities of this strange arbour, which is decked with every gay or shining material that the little architects can procure; snail or mussel shells, pebbles, or white bones are laid as ornaments to grace the entrances, and Parrot-feathers or brightly-coloured rags are stuck between the twigs; indeed, so well do the natives know the passion of the Satin Bird for glittering or polished objects, that should they lose anything of that description, they at once endeavour to discover the bower that has been beautified at the expense of their property. Gould mentions having found a pretty pebble an inch and a half long lying within one of these edifices, which was also decked with a variety of blue woollen scraps that had, doubtless, been stolen from a settlement in the vicinity. Males and females alike resort to these bowers, solely, as it would appear, to disport themselves in very much the same manner as we do in a ball-room, dancing and turning about with the greatest spirit and liveliness, or chasing each other up and down their gay apartment in an untiring whirl of sportive delight. Should a female lose her mate, she at once consoles herself with another; and we have known an instance in which one of them was deprived of no less than three successive mates, without deterring her from participating in the gambols of the rest of the party. The males principally undertake the actual labours of constructing the gala chamber, whilst all the more delicate work of beautifying the interior devolves entirely upon the females; the nests are said to be built at no great distance from the bower; but the eggs, as far as we know, have never been found. A pair of Satin Birds were presented to the Zoological Gardens in the Regent's Park some few years ago, and a bower, constructed by them, may be seen in excellent preservation in the British Museum.
The COLLAR BIRDS (Chlamydera) are nearly allied to the group last described, and are addicted to the same remarkable habit of bower-building. In these species the beak is compressed at its sides and notched towards its tip; the upper mandible is slightly vaulted; the wings are long and pointed, their third and fourth quills being of greater length than the rest; the tail is long and slightly rounded; the tarsi are covered in front with broad scales; the toes are large, and furnished with sharp-pointed claws.
