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.
Those of us interested in wildlife can help avoid conflicts, which always end up with the moose or bears as the losers. To protect wildlife and keep problems from arising, either locate feeders out of reach of moose and bears, or put up feeders after bears are hibernating (Nov. 1) and take them down before bears begin to wake up in spring (mid_March). Don't feed birds in any way that will harm them. Keep feeders clean, and clean up the area on the ground around feeders that may attract other wildlife species to feeders.