The one thing on which the wedge-tailed eagle really insists when in his summer quarters, is his daily spray bath from a hose. When his keeper goes in to give the daily morning wash to the cage, the eagles perch close above his head and screech and scream until the spray is turned upon them. Then they spread their wings, to get it thoroughly, and come out thoroughly soaked. When the spray is merely turned upon their log instead of upon the birds as they sit higher up, they fly down and get into the current wherever it may be.
Memory of the Cereopsis Goose. Keeper Atkin also showed me an instance of the wisdom of the cereopsis geese, from Van Diemens Land, South Australia. During the winter those birds are kept in the Wild-Fowl Pond; but in summer they are quartered in a secluded yard of the Crane's Paddock, nearly half a mile away. Twice a year these birds go under their own steam between those two enclosures. When turned out of the Cranes' Paddock last November they at once set out and walked very briskly southward up the Bird's Valley, past the Zebra House. On reaching the Service Road, a quarter of a mile away, they turned to the left and kept on to the Wolf Dens. There they turned to the right and kept on two hundred yards until they reached the walk coming down from the Reptile House. There they turned to the left, crossed the bridge, stopped at the gate to the Wild-Fowl Pond enclosure, and when the gate was opened they entered and declared themselves "at home."
Mr. Atkin says that in spring these birds show just as much interest in going back to their summer home. Falconry. We cannot do otherwise than regard the ancient sport of falconry as a high tribute to the mental powers of the genus Falco. The hunting falcons were educated into the sport of hawking, just as a boy is trained by his big brother to shoot quail on the wing. The birds were furnished with hoods and jesses, and other garnitures. They were carried on the hand of the huntsman, and launched at unlucky herons and bitterns as an intelligent living force. The hunting falcon entered into the sport like a true sportsman, and he played the game according to the rules. The sport was cruel, but it was politely exciting, and it certainly was a fine exhibition of bird intelligence. Part of that intelligence was instinctive, but the most of it was acquired, by educational methods.
Outstanding Traits in a Few Groups of Birds. In creatures as much lacking in visible expression as most birds are, it is difficult to detect the emotions and temperaments that prevail in the various groups. Only a few can be cited with certain confidence.
Vanity Displays in Birds. The males of a few species of birds have been specially equipped by nature for the display of their natural vanity. Anyone who has seen a Zoological Park peacock working overtime on a Sunday afternoon in summer when the crowds of visitors are greatest, solely to display the ocellated splendor of his tail plumage, surely must conclude that the bird is well aware of the glories of his tail, and also that he positively enjoys showing off to admiring audiences.
These displays are not casual affairs in the ordinary course of the day's doings. It is a common thing for one of our birds to choose a particularly conspicuous spot, preferably on an elevated terrace, from which his display will carry farthest to the eyes of the crowd. Even if the bird were controlled by the will of a trainer for the purpose of vanity display, the exhibition could not possibly be more perfect. Like a good speaker on a rostrum, the bird faces first in one direction and then in another, and occasionally with a slow and stately movement it completely revolves on its axis for the benefit of those in the rear. "Vain as a peacock" is by no means an unjustifiable comparison.
Plumage displays are indulged in by turkeys, the blue bird of paradise, the greater and lesser birds of paradise, the sage grouse and pinnated grouse, ruffed grouse, golden pheasant and argus pheasant.
On the whole, we may fairly set down vanity as one of the well defined emotions in certain birds, and probably possessed by the males in many species which have not been provided by nature with the means to display it conspicuously.
Materials for Study. In seeking means by which to study the mental and temperamental traits of wild birds and mammals, the definite and clearly cut manifestations are so few in kind that we are glad to seize upon everything available. Of the visible evidences, pugnacity and the fighting habit are valuable materials, because they are visible. Much can be learned from the fighting weakness or strength of animals and men.
In our great collections of birds drawn from all the land areas of the globe, our bird men see much fighting. Mr. Crandall has prepared for me in a condensed form an illuminating collection of facts regarding