. Department circular. Agriculture. Fig. 1. — Perspective and sectional drawings of an improvised nest box for the interior of build- ings. (After Biological Survey.) Fig. 2. — Nest box opening at the top. (After Biological Survey.) Where this happens the boxes intended for native birds may be so arranged that the sparrows may be kept out, entrapped or driven out. A box having an entrance not over seven- eighths of an inch in diameter will admit house wrens and keep out sparrows; chickadees have been known very rarely to nest in a box with a round entrance one inch in diameter, and this usuall
. Department circular. Agriculture. Fig. 1. — Perspective and sectional drawings of an improvised nest box for the interior of build- ings. (After Biological Survey.) Fig. 2. — Nest box opening at the top. (After Biological Survey.) Where this happens the boxes intended for native birds may be so arranged that the sparrows may be kept out, entrapped or driven out. A box having an entrance not over seven- eighths of an inch in diameter will admit house wrens and keep out sparrows; chickadees have been known very rarely to nest in a box with a round entrance one inch in diameter, and this usually keeps out sparrows, but if the entrance is large enough for any bird larger than the house wren the sparrow may get in. As sparrows begin nesting earlier in the spring than most other birds they may be driven from a nesting box. 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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Keywords: ., bookcentury1900, bookdecade1910, bookpubl, booksubjectagriculture
