Rap! rap! rap! the little inspector has come to look at our apple trees. "You are welcome, downy woodpecker," say we every one. "Stay as long as you like. We want to look at you closely so that we shall know you every time we see you."
Fig. 325. Cocoons of the codlin-moth as they were found attached to a piece of loose bark, natural size.
A bird about three inches shorter than a robin, black above, white below, white along the middle of the back, and the male red on the nape of the neck: this is the way downy looks. A hardworking, useful, sociable tenant of the farm: this is what downy is.
Let us see how this little woodpecker is useful. If you live on a farm, you have probably heard of borers—grubs that get into trees and injure them. Your father does not like these grubs, but downy does. He seems to like any kind of grub. Watch him on a tree sometimes when he is looking for one. He knows where to find it, although neither you nor I might suspect that an insect is living beneath the smooth bark. Then he bores into the tree, and spears the grub with his long tongue. His tongue is a remarkable weapon. He can stretch it two inches beyond the tip of his bill, and it is barbed on both sides.
Downy does not stop work, you must remember, when borers are not plenty. Beetles nibble no more plants after his eyes light on them. They are trespassers, and as judge, jury, and executioner, he proves his right to be considered a most useful farm hand. Ants, too, provide him with a good meal occasionally.
Among the helpful deeds of the downy woodpecker, we must not forget to mention that he destroys great numbers of the larvæ or worms of the codlin-moth in winter, when these worms have tucked themselves away in the crevices of the bark, all wrapped in their cocoons. ([Fig. 325], [326].) Perhaps your father has shown you these little cocoons along the body and in the crotches of the apple tree. If not, you can find them yourself. Open some of them and see whether the worm is still there. If he is not, downy has probably taken him. I suppose you know that the larvæ of the codlin-moth are the worms you find in apples. See Leaflet LIII.
You must not confound the downy woodpecker with that other woodpecker, the sap-sucker, that often drills rings of holes in the trunks of apple trees. The sapsucker has yellow on his under parts. I shall tell you about him some other time.
Fig. 326. Pupæ of the codlin-moth in cocoons, enlarged.