Beyond all others, two subdivisions of the animal kingdom have so riveted the attention of men by their unusual powers, and enter so frequently into the myths of every nation of the globe, that a right understanding of their symbolic value is an essential preliminary to the discussion of the divine legends. They are the BIRD and the SERPENT. We shall not go amiss if we seek the reasons of their pre-eminence in the facility with which their peculiarities offered sensuous images under which to convey the idea of divinity, ever present in the soul of man, ever striving at articulate expression. The bird has the incomprehensible power of flight; it floats in the atmosphere, it rides on the winds, it soars toward heaven where dwell the gods; its plumage is stained with the hues of the rainbow and the sunset; its song was man's first hint of music; it spurns the clouds that impede his footsteps, and flies proudly over the mountains and moors where he toils wearily along. He sees no more enviable creature; he conceives the gods and angels must also have wings; and pleases himself with the fancy that he, too, some day will shake off this coil of clay, and rise on pinions to the heavenly mansions. All living beings, say the Eskimos, have the faculty of soul (_tarrak_), but especially the birds.[101-2] As messengers from the upper world and interpreters of its decrees, the flight and the note of birds have ever been anxiously observed as omens of grave import. "There is one bird especially," remarks the traveller Coreal, of the natives of Brazil, "which they regard as of good augury. Its mournful chant is heard rather by night than day. The savages say it is sent by their deceased friends to bring them news from the other world, and to encourage them against their enemies."[102-1] In Peru and in Mexico there was a College of Augurs, corresponding in purpose to the auspices of ancient Rome, who practised no other means of divination than watching the course and professing to interpret the songs of fowls. So natural and so general is such a superstition, and so wide-spread is the respect it still obtains in civilized and Christian lands, that it is not worth while to summon witnesses to show that it prevailed universally among the red race also. What imprinted it with redoubled force on their imagination was the common belief that birds were not only divine nuncios, but the visible spirits of their departed friends. The Powhatans held that a certain small wood bird received the souls of their princes at death, and they refrained religiously from doing it harm;[102-2] while the Aztecs and various other nations thought that all good people, as a reward of merit, were metamorphosed at the close of life into feathered songsters of the grove, and in this form passed a certain term in the umbrageous bowers of Paradise.