Travels on the Amazon. Alfred Russel Wallace

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resembling nuts and cream, and is no doubt very nourishing; it is much used in Pará, where it is constantly sold in the streets, and, owing to the fruit ripening at different seasons, according to the locality, is to be had there all the year round.

      On the east side of the river, along which we had kept in our descent, there was more cultivation than on the side we went up. A short distance from the shore the land rises, and most of the houses are situated on the slope, with the ground cleared down to the river. Some of the places are kept in tolerable order, but there are numbers of houses and cottages unoccupied and in ruins, with land once cultivated, overgrown with weeds and brushwood. Rubber-making and gathering cacao and Brazil-nuts are better liked than the regular cultivation of the soil.

      In the districts we passed through, sugar, cotton, coffee, and rice might be grown in any quantity and of the finest quality. The navigation is always safe and uninterrupted, and the whole country is so intersected by igaripés and rivers that every estate has water-carriage for its productions. But the indolent disposition of the people, and the scarcity of labour, will prevent the capabilities of this fine country from being developed till European or North American colonies are formed. There is no country in the world where people can produce for themselves so many of the necessaries and luxuries of life. Indian corn, rice, mandiocca, sugar, coffee, and cotton, beef, poultry, and pork, with oranges, bananas, and abundance of other fruits and vegetables, thrive with little care. With these articles in abundance, a house of wood, calabashes, cups and pottery of the country, they may live in plenty without a single exotic production. And then what advantages there are in a country where there is no stoppage of agricultural operations during winter, but where crops may be had, and poultry be reared, all the year round; where the least possible amount of clothing is the most comfortable, and where a hundred little necessaries of a cold region are altogether superfluous. With regard to the climate I have said enough already; and I repeat, that a man can work as well here as in the hot summer months in England, and that if he will only work three hours in the morning and three in the evening, he will produce more of the necessaries and comforts of life than by twelve hours' daily labour at home.

      Nothing more of importance occurred, and we arrived safely at Pará on the 30th of September, just five weeks from the day we left. We had not had a wet day the whole voyage, yet found to our surprise that it had been there the same as usual—a shower and a thunderstorm every second or third day.

      CHAPTER IV

MEXIANA AND MARAJÓ

      Visit to Olería—Habits of Birds—Voyage to Mexiana—Arrival—Birds—Description of the Island—Population—Slaves, their Treatment and Habits—Journey to the Lake—Beautiful Stream—Fish and Birds at the Lake—Catching Alligators—Strange Sounds, and Abundance of Animal Life—Walk back—Jaguar Meat—Visit to Jungcal in Marajó—Embarking Cattle—Ilha das Frechas.

      Soon after our return to Pará, my hand became so much inflamed, that I was obliged to put my arm in a sling, and go to a doctor, under whose treatment I remained a fortnight, unable to do anything, not even pin an insect, and consequently rather miserable. As I intended, as soon as possible, going to the great island of Marajó, in search of some of the curious and rare water-birds which abound there, I obtained permission from Mr. C., an English gentleman, to visit his cattle estates; but as there was no canoe going there for some weeks, I spent the interim at Olería, where M. Borlaz kindly offered me a room and a place at his table.

      I found plenty of occupation in procuring specimens of the various small birds, and making myself acquainted with their habits. None were more abundant, both in species and individuals, than the bush-shrikes, which are all remarkable for the same kind of falling note I have already alluded to, though each one has some slight peculiarity by which it may be distinguished. They generally hide themselves in the very thickest and most impenetrable bushes, where it is impossible to see them except by creeping up within a distance of two yards, when it is difficult to shoot without blowing them to pieces. They are small birds with very loose, long, silky feathers, prettily banded or spotted with black and white, and are constantly hopping about the bushes and twigs, picking off whatever small insects they fall in with.

      The ant-thrushes are another closely allied group, which are equally abundant. They have stronger legs and very short tails, and walk more on the ground, picking up insects, especially ants, very much after the manner of poultry. When one is shot, it is often a dangerous matter to go and fetch it, for the ground generally swarms with ants, which attack an intruder most unmercifully both with stings and jaws. Many times, after a fruitless attempt, have I been obliged to leave the dead body on the field, and beat an inglorious retreat.

      In all works on Natural History, we constantly find details of the marvellous adaptation of animals to their food, their habits, and the localities in which they are found. But naturalists are now beginning to look beyond this, and to see that there must be some other principle regulating the infinitely varied forms of animal life. It must strike every one, that the numbers of birds and insects of different groups, having scarcely any resemblance to each other, which yet feed on the same food and inhabit the same localities, cannot have been so differently constructed and adorned for that purpose alone. Thus the goat-suckers, the swallows, the tyrant fly-catchers, and the jacamars, all use the same kind of food, and procure it in the same manner: they all capture insects on the wing, yet how entirely different is the structure and the whole appearance of these birds! The swallows, with their powerful wings, are almost entirely inhabitants of the air; the goat-suckers, nearly allied to them, but of a much weaker structure, and with largely developed eyes, are semi-nocturnal birds, sometimes flying in the evening in company with the swallows, but most frequently settling on the ground, seizing their prey by short flights from it, and then returning to the same spot. The fly-catchers are strong-legged, but short-winged birds, which can perch, but cannot fly with the ease of the swallows: they generally seat themselves on a bare tree, and from it watch for any insects which may come within reach of a short swoop, and which their broad bills and wide gape enable them to seize. But with the jacamars this is not the case: their bills are long and pointed—in fact, a weak kingfisher's bill—yet they have similar habits to the preceding: they sit on branches in open parts of the forest, from thence flying after insects, which they catch on the wing, and then return to their former station to devour them. Then there are the trogons, with a strong serrated bill, which have similar habits; and the little humming-birds, though they generally procure insects from the flowers, often take them on the wing, like any other fissirostral bird.

      What birds can have their bills more peculiarly formed than the ibis, the spoonbill, and the heron? Yet they may be seen side by side, picking up the same food from the shallow water on the beach; and on opening their stomachs, we find the same little crustacea and shell-fish in them all. Then among the fruit-eating birds, there are pigeons, parrots, toucans, and chatterers,—families as distinct and widely separated as possible,—which yet may be often seen feeding all together on the same tree; for in the forests of South America, certain fruits are favourites with almost every kind of fruit-eating bird. It has been assumed by some writers on Natural History, that every wild fruit is the food of some bird or animal, and that the varied forms and structure of their mouths may be necessitated by the peculiar character of the fruits they are to feed on; but there is more of imagination than fact in this statement: the number of wild fruits furnishing food for birds is very limited, and birds of the most varied structure and of every size will be found visiting the same tree.

      Insects were now more abundant than ever, and new kinds were met with almost every day. Lovely little butterflies, spangled with gold, or glittering with the most splendid metallic tints, hid themselves under leaves or expanded their wings in the morning sun; while the larger and more majestic kinds flew lazily along the shaded forest paths. The more sombre Hesperidæ were the most abundant, and it would often happen that, of a dozen specimens taken in a day's excursion, no two were alike.

      At length the canoe, for which I had been waiting, was ready to sail; and on the 3rd of November we left Pará for the island of Mexiana, situated in the main stream of

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