Like the wind the bird sweeps through the aërial spaces, sings in the forests, and rustles on its course; like the cloud it floats in mid-air, and casts its shadow on the earth; like the lightning it darts from heaven to earth to strike its unsuspecting prey. These tropes were truths to savage nations, and led on by that law of language which forced them to conceive everything as animate or inanimate, itself the product of a deeper law of thought which urges us to ascribe life to whatever has motion, they found no animal so appropriate for their purpose here as the bird. Therefore the Algonquins say that birds always make the winds, that they create the waterspouts, and that the clouds are the spreading and agitation of their wings; the Navajos that at each cardinal point stands a white swan, who is the spirit of the blasts; so also the Dakotas frequently explain the thunder as the sound of the cloud-bird flapping his wings; the lightning as the fire that flashes from his tracks, like the sparks which the buffalo scatters when he scours over a stony plain.
Estimates differ much as to the size of the Thunder-Bird. In one tradition an Indian found its nest, and secured a feather which was above two hundred feet long, while in another tradition the bird is said to be no bigger than one's little finger. But among the Western Indians he is an immense eagle. "When this aërial monster flaps his wings loud peals of thunder roll over the prairie; when he winks his eye it lightens; when he wags his tail the waters of the lake which he carries on his back overflow and produce rain." Mixcoatl, the Mexican Cloud-Serpent, as well as Jove, carries his bundle of arrows or thunderbolts, which in the hand of Thor are represented by his mighty club or hammer. The old and universal belief that stones were hurled by the Thunder-God is not so far-fetched as we, in our pride of science, might think, for the flints which are mistaken for thunderbolts, and which become objects of adoration as well as charms, produce a flash when struck by the lightning. In the lightning flash man would see the descent of fire from heaven for his needs. That he should regard it, like water, as a living creature, with power to hurt or help him, is in keeping with attribution of life to all that moved. Its apparent connection with the great source of heat would foster the feeling which expressed itself in fire-worship, with its curious survivals to modern times. No element was more calculated to excite awe in its seeming unrelation to the objects which produced it. Once secured, to guard it from extinction or theft was a serious duty, and everything from which it issued, trees as its hiding-place, since it came from the wood when rubbed, stones also, since sparks shot from them when struck, were held sacred. In the manifold myths about its origin one feature is common, that its seed was stolen, the chief agents (probably as the messengers between earth and sky) being birds, or men assuming the form of birds. The Sioux Indians say that their first ancestor procured his fire from the sparks which a panther struck from the rocks as he bounded up a hill. But of examples from the lower culture, forerunners of the Zeus-defying Prometheus, Mr. Gill's _Myths of the South Pacific_ supplies one which may be taken as a sample of the rest. Maui, a famous South Sea hero, finding some cooked food in a basket brought by Buataranga from the nether world, and relishing it more than raw food, determines to steal the fire, and flying to the Buataranga's realm frightens the fire-god by threats and blows into revealing the secret. Then wresting the fire-sticks from him he sets the under-world in flames, and returns with his prize to the upper-world; thenceforth "all the dwellers there used fire-sticks, and enjoyed the luxuries of light and of cooked food."