How To Make a Birdhouse from a hard-shelled gourd: Drill an entrance hole high enough from the bottom so a bird can step down into the house. Smooth the edges. Remove seeds and pulp. Drill small holes in the base for drainage. Drill a hole through the top of the gourd to hang the birdhouse, and a quarter-sized hole at the top on the back side to provide air circulation. The entrance hole must be big enough for the bird. The following are just a few diameters for specific birds: Bluebird, 11⁄4"; Flicker, 21⁄2"; House Wren, 1"; Chickadee, 11⁄4"; Purple Martin, 21⁄2".
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