Boreal Owls prefer mixed spruce_hardwood forests, while Saw_whet Owls prefer to nest near the edge of spruce or deciduous forest groves. Woodpecker nest boxes should be placed 6┰ feet above the ground, though Hairy Woodpeckers prefer nest sites 12 feet or more above the ground. Common Flickers nest in open areas and open park_like areas, while Hairy and Downy Woodpeckers prefer open deciduous forests.
To prevent the spread of some avian diseases, food should not be spread on the ground, and feeders should be cleaned and disinfected regularly. Other Attractions for Birds.Birds do not have teeth; instead, they grind food in their gizzards. Birds eat small pieces of sand and gravel, or "grit" to aid the grinding process. In winter, when the ground is covered by snow, suitable grit may be hard to find. You can supply grit to birds at the feeder in the form of crushed eggshells, coarse sand, or from boxes of grit that are sold at variety and pet stores.