@altordo: Four nest boxes, one at each corner of your land, turn it into a bird strike zone. Boxes go 100+ yards apart, the hole is exactly 1 1/2 inches (it lets bluebirds in and keeps starlings out), mounted about 5 ft up on their own pole with a guard, no perch, facing open short grass. About two thirds of a bluebird's diet is bugs: grasshoppers, beetles and caterpillars. Sources: North American Bluebird Society (nest box size, placement and spacing); Cornell Lab of Ornithology, NestWatch (nest box guidance); USDA Farmers' Bulletin 630, Beal 1915, "Some Common Birds Useful to the Farmer" (bluebird diet); Jedlicka, Greenberg & Letourneau 2011, "Avian Conservation Practices Strengthen Ecosystem Services in California Vineyards," PLOS ONE (nest boxes and insect control). #offgrid #homesteading #organicgardening