. Department circular. Agriculture. 17. r © coarse sawdust and dry earth mixed must be placed in the bot- tom, as woodpeckers make no nest but rely on decaying wood or chips which they strike oft' the tree to make a bed for their eggs. (See Figs. 16 and 17 and Plate V.) A Warning. — It is best to have all deep nesting boxes roughened in- side. They should be either rough- sawed or scored in some way so that small birds like tree swallows may get out if they once get in. If a box is planed inside and is not large enough in diameter for them to fly out freely they cannot climb out. This is why m
. Department circular. Agriculture. 17. r © coarse sawdust and dry earth mixed must be placed in the bot- tom, as woodpeckers make no nest but rely on decaying wood or chips which they strike oft' the tree to make a bed for their eggs. (See Figs. 16 and 17 and Plate V.) A Warning. — It is best to have all deep nesting boxes roughened in- side. They should be either rough- sawed or scored in some way so that small birds like tree swallows may get out if they once get in. If a box is planed inside and is not large enough in diameter for them to fly out freely they cannot climb out. This is why many have been found dead in such boxes, and why blue- birds cannot escape from water conduc- tors when they get inside and are some- times found drowned in cisterns. Sparrow Hawk. — Flicker boxes have been used occasionally by sparrow hawks, but a more roomy box, at least 8 inches in diameter, would be better. Screech Old. — Inside dimensions of box actually occupied on my place in which young were raised, 7 by 11 by 15 inches. Long axis vertical. Size of entrance hole, 3 inches wide by 4 inches high (Fig. 18). Wood Duck. — Inside measurements, Fig. ^^^^^^ jq ^^ ^^ ^^ 24 inchcs. Entrance, 4 inches in diameter and 18 inches from the bottom. Long axis vertical. &. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Massachusetts. Dept. of Agriculture. Boston, Mass.
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