Or let us start before daylight, on a calm morning, along the banks of a larger tributary, to proceed towards the heights of the Sierra Erere. As dawn begins to redden the sky, large flocks of ducks and of a small Amazonian goose may be seen flying towards the lake. Here and there we see a cormorant, seated alone on the branch of a dead tree; or a kingfisher poises himself over the water, watching for his prey. Numerous gulls are gathered in large companies on the trees along the river-shore. Alligators lie on its surface, diving with a sudden splash at the approach of the canoe. Occasionally a porpoise emerges from the water, showing himself for a moment, and then disappearing. Sometimes a herd of capybaras, resting on the water's edge, are startled at our approach. There sits, on the branch of an imbauba, rolled-up in its peculiar attitude, a sloth, the very picture of indolence, with its head sunk between its arms. The banks, covered in many places with the beautiful capim-grass, afford excellent pasturage for cattle. Now we turn into an inner stream, or igarape, often having to make our way with difficulty amid islands of capim-grass. Now we pass through a magnificent forest of the beautiful fan-palm--the miriti--overshadowing many smaller trees and innumerable shrubs, bearing light conspicuous flowers. Among them are numerous Leguminosae--one of the most striking, the fava, having a colossal pod. The whole mass of vegetation is interwoven with innumerable creepers, amid which the flowers of the bignonia, with their open trumpet-shaped corollas, are conspicuous. The capim is bright with the blossoms of the mallow growing in its midst, in some places edged with the broad-leaved aninga--a large aquatic arum. Through these forests, where animal life is no less rich and varied than the vegetation, our canoe glides silently for hours.