YOU ought to hear the scream of the hen-hawks circling high in the air. In August and September and late into October, if you listen in the open country, you will hear their piercing whistle,—shrill, exultant scream comes nearer to describing it,—as they sail and sail a mile away in the sky.
II
You ought to go out upon some mowing hill or field of stubble and hear the crickets, then into the apple orchard and hear the katydids, then into the high grass and bushes along the fence and hear the whole stringed chorus of green grasshoppers, katydids, and crickets. You have heard them all your life; but the trouble is that, because you have heard them so constantly in the autumn, and because one player after another has come gradually into the orchestra, you have taken them as part of the natural course of things and have never really heard them individually, to know what parts they play. Now anybody can hear a lion roar, or a mule bray, or a loon laugh his wild crazy laugh over a silent mountain lake, and know what sound it is; but who can hear a cricket out of doors, or a grasshopper, and know which is which?
III
Did you ever hear a loon laugh? You ought to. I would go a hundred miles to hear that weird, meaningless, melancholy, maniacal laughter of the loon, or great northern diver, as the dusk comes down over some lonely lake in the wilderness of the far North. From Maine westward to northern Illinois you may listen for him in early autumn; then, when the migration begins, anywhere south to the Gulf of Mexico. You may never hear the call of the bull moose in the northern woods, nor the howl of a coyote on the western prairies, nor the wild cac, cac, cac of the soaring eagles, nor the husky yap, yap, yap of the fox. But, if you do, “make a note of it,” as Captain Cuttle would say; for the tongues that utter this wild language are fast ceasing to speak to us.
IV
One strangely sweet, strangely wild voice that you still may hear in our old apple orchards, is the whimpering, whinnying voice of the little screech owl. “When night comes,” says the bird book, “one may hear the screech owl’s tremulous, wailing whistle. It is a weird, melancholy call, welcomed only by those who love Nature’s voice, whatever be the medium through which she speaks.” Now listen this autumn for the screech owl; listen until the weird, melancholy call is welcomed by you, until the shiver that creeps up your back turns off through your hair, as you hear the low plaintive voice speaking to you out of the hollow darkness, out of the softness and the silence of night.