The same thing may be noticed among the birds in their love chasings; the pursuer seems to know perfectly the mind of the pursued. This concert of action among birds is very curious. When they are on the alert a flock of sparrows, or pigeons, or cedar-birds, or snow buntings, or blackbirds, will all take flight as if there was but one bird, instead of a hundred. The same impulse seizes every individual bird at the same instant, as if they were sprung by electricity. Or when a flock of birds is in flight, it is still one body, one will; it will rise, or circle, or swoop with a unity that is truly astonishing. A flock of snow buntings will perform their aerial evolutions with a precision that the best-trained soldiery cannot equal. Have the birds an extra sense which we have not? A brood of young partridges in the woods will start up like an explosion, every brown particle and fragment hurled into the air at the same instant. Without word or signal, how is it done? XII LOVERS OF NATURE I We love nature with a different love at different periods of our lives. In youth our love is sensuous. It is not so much a conscious love as it is an irresistible attraction. The senses are keen and fresh, and they crave a field for their exercise. We delight in the color of flowers, the perfume of meadows and orchards, the moist, fresh smell of the woods. We eat the pungent roots and barks, we devour the wild fruits, we slay the small deer. Then nature also offers a field of adventure; it challenges and excites our animal spirits. The woods are full of game, the waters of fish; the river invites the oar, the breeze, the sail, the mountain-top promises a wide prospect. Hence the rod, the gun, the boat, the tent, the pedestrian club. In youth we are nearer the savage state, the primitive condition of mankind, and wild nature is our proper home. The transient color of the young bird points its remote ancestry, and the taste of youth for rude nature in like manner is the survival of an earlier race instinct. Later in life we go to nature as an escape from the tension and turmoil of business, or for rest and recreation from study, or seeking solace from grief and disappointment, or as a refuge from the frivolity and hypocrisies of society. We lie under trees, we stroll through lanes, or in meadows and pastures, or muse on the shore. Nature "salves" our worst wounds; she heals and restores us. Or we cultivate an intellectual pleasure in nature, and follow up some branch of natural science, as botany, or ornithology, or mineralogy. Then there is the countryman's love of nature, the pleasure in cattle, horses, bees, growing crops, manual labor, sugar-making, gardening, harvesting, and the rural quietness and repose.