Life abounds everywhere in nature, from tiny insects to great sea creatures.
The air is crowded with birds,—beautiful, tender, intelligent birds,—to whom life is a song and a thrilling anxiety,—the anxiety of love. The air is swarming with insects,—those little animated miracles. The waters are peopled with innumerable forms,—from the animalcule, so small that a hundred and fifty millions of them would not weigh a grain, to the whale, so large that it seems an island as it sleeps upon the waves. The bed of the sea is alive with polyps, crabs, star-fishes, and with sand-numerous shell-animalcules. The rugged face of rocks is scarred by the silent boring of soft creatures, and blackened with countless mussels, barnacles, and limpets. Life everywhere!—on the earth, in the earth, crawling, creeping, burrowing, boring, leaping, running. If the sequestered coolness of the wood tempt us to saunter into its checkered shade, we are saluted by the murmurous din of insects, the twitter of birds, the scrambling of squirrels, the startled rush of unseen beasts; all telling how populous is this seeming solitude. If we pause before a tree or shrub or plant, our cursory and half-abstracted glance detects a colony of various inhabitants. We pluck a flower, and in its bosom we see many a charming insect busy at its appointed labor. We pick up a fallen leaf; and, if nothing is visible on it, there is probably the trace of an insect larva hidden in its tissue, and awaiting development. The drop of dew upon this leaf will probably contain its animals, visible under the microscope. The same microscope reveals that the blood-rain, suddenly appearing on bread, and awakening superstitious terrors, is nothing but a collection of minute animals, (Monas prodigiosa); and that the vast tracts of snow which are reddened in a single night owe their color to the marvellous rapidity in reproduction of a minute plant (Protococus nivalis). The very mould which covers our cheese, our bread, our jam, our ink, and disfigures our damp walls, is nothing but a collection of plants. The many-colored fire which sparkles on the surface of a summer sea at night, as the vessel ploughs her way, or which drips from the oars in lines of jewelled light, is produced by millions of minute animals.
— Sala