Up this singular waterway our adventurers advanced, under the guidance of the bordering line of verdure. Their progress was necessarily slow, as the two who could swim well were compelled to assist the others; but all were aided by a circumstance that chanced to be in their favour,—the current of the Gapo, which was going in the same direction with themselves. Herein they were greatly favoured, for the flow of the flood corresponded very nearly with the course of the igarápe; and, as they advanced, they might have fancied themselves drifting down the channel of some gently flowing stream. The current, however, was just perceptible; and though it carried them along, it could not be counted on for any great speed. With it and their own exertions they were enabled to make about a mile an hour; and although this rate might seem intolerably slow, they were not discontented, since they believed themselves to be going in the right direction. Had they been castaways in mid-ocean, the case would have been different. Such tardy travelling would have been hopeless; but it was otherwise in the forest sea that surrounded them. On one side or the other they could not be more than fifty miles from real dry land, and perhaps much less. By going right, they might reasonably hope to reach it, though detained upon the way. It was of the utmost importance, however, that the direction should be known and followed. A route transverse to it might take them a thousand miles, either way, through a flooded forest,—westward almost to the foot of the Andes,—eastward to the mouth of the Amazon! The experienced tapuyo, knowing all this, was extremely cautious in choosing the course they were now pursuing. He did not exactly keep in the line indicated by the flow of the flood. Although the echente was still going on, he knew that its current could not be at right angles to that of the river, but rather obliqued to it; and in swimming onward he made allowance for this oblique, the igarápe fortunately trending at a similar inclination.
Several hours were spent in slowly wending along their watery way, the swimmers occasionally taking a rest, stretched along the surface of the water, supported by hanging llianas or the drooping branches of the trees. At noon, however, a longer halt was proposed by the guide, to which his followers gladly gave consent. All were influenced by a double desire,—to refresh themselves not only by a good rest, but by making a meal on the cold roast macaws, several of which were strapped upon the shoulders of the tapuyo. A tree with broad, spreading branches offered a convenient place, and, climbing into it, they took their seats to await the distribution of the dinner, which was committed to the care of the ex-steward, Mozey.
Chapter Thirty Seven.
About Humming-Birds.
Previous to ascending their dining-tree, the swimmers had been more than six hours in the water, and, as nearly as they could guess, had made about that number of miles. They congratulated themselves on having met with no hostile inhabitants of the Gapo, for the jararáca and jacaré, with the perils encountered while in the presence of these two dangerous reptiles, were fresh enough in their remembrance to inspire them with continual fear. All along the way, the Indian had been constantly upon the alert. Nothing had occurred to cause them alarm, though many strange sounds had been heard, and strange creatures had been seen. Most of these, however, were of a character to cheer rather than affright them. The sounds were mostly musical,—the voices of birds,—while the creatures seen were the birds themselves, many of beautiful forms and bright plumage, perched upon the tree-tops, or winging their way overhead. Conspicuous among them were the tiny winged creatures called humming-birds, with which the Gapo abounded. During their swim they had seen several distinct species of these lovely little sprites, flashing like meteors over the surface of the water, or darting about through the tree-tops like sparks of glistening light. They appeared to be the gnomes and elves of the place.
While eating dinner, our adventurers were favoured with an excellent opportunity of observing the habits of these graceful and almost microscopic creatures. A tree stood near, whose top was surmounted by a parasite,—a species of bignonia,—in full blossom, that with its array of sweet-scented flowers completely covered the tree, almost concealing the green foliage underneath. Over this flowery spot hundreds of humming-birds were hovering, now darting from point to point, anon poised upon swiftly whirring wings in front of an open flower, their tiny beak inserted into the corolla, therefrom to extract the savoury honey. There were several species of them, though none of them of large size, and all looking more like insects than birds. But for the swiftness of their motions, they might have passed for a swarm of wild bees (meliponae) disporting themselves among the flowers. Ralph and Rosa were delighted with the spectacle, though it was not new to them, for the warmer valleys of the Andes, through which they had passed in approaching the headwaters of the Amazon, were the favourite habitat of the humming-birds, and there a greater number of species exist than in Amazonia itself. What was new to them, however, and to the rest of the party as well, was some information imparted by the tapuyo while they sat conversing after dinner. He said that there were two kinds of these birds, which, although alike in size, beauty, bright plumage, and many other respects, were altogether distinct in their habits and ways of life. By two kinds he did not mean two species, for there were many, but two sets of species, or groups, as the Indian would have called them, had he been a student of ornithology. One set, he said,—and the several species then before their eyes belonged to it,—lived upon the juice of the flowers, and this was their only food. These frequented such open campos as those on the southern side of the Solimoës, and along the rivers running into it from that direction. They were also common in plantations, and other places where clearings had been made, or where the forest was thin and scattering, because there only could they find a sufficiency of flowers. It was only at times that they made excursions into the great water-forest, when some of the sipo plants were in blossom, just as the one before them was at that time. The species they saw did not belong to the Gapo. They had only strayed there upon a roving excursion, and would soon return to the mainland,—the treeless regions. The kinds that frequented the great forest never went out of it, and cared nothing about flowers. If seen hovering around a tree in blossom, it was only because they were in pursuit of insects, which had been attracted thither in search of the sweet juices. Upon these the forest humming-birds regularly preyed, making their exclusive diet upon flies, which they caught as much among the foliage as the flowers, darting upon the insects whenever they perched upon the leaves, and snapping them up either from the upper or under side. They built their nests upon the tips of the palm-leaves, choosing the side that was inward towards the tree, from which they suspended them. They were purse-shaped, and composed of fibres closely woven together with a thick lining of a fine, soft silk-cotton, taken from the fruit of a tree called samaüma. They did not come much into the sun, like the other kinds, but kept more in the shade, and might be often met whirring about in the aisles of the forest. Sometimes they would poise themselves in the air, right in front of a person passing through among the tree-trunks, and, after remaining till the intruder’s face would be within a few feet of them, would fly on in advance of him, and again come to a pause in the same way, repeating the manoeuvre several times in succession. All these things, averred the observant Indian, made the humming-birds that kept constantly to the forest very different from those that only visited it upon occasions, and therefore, in his opinion, they were of two distinct kinds. And his opinion was the correct one, founded on observations already made by the ornithologist, and which have resulted in the classification of the humming-birds into two great groups, the Trochilinae and Phaethorninae.
