In freezing climates, a birdbath heater will keep ice from forming. You can buy a dripper or sprayer, or you can recycle an old bucket or plastic container by punching a tiny hole in the bottom, filling it with water, and hanging it above the birdbath so the water drips out. One of the best ways to make your birdbath more attractive is to provide dripping water. If the bath is on the ground, arrange a few branches or stones in the water so that birds can stand on them and drink without getting wet (this is particularly important in winter). House Finch bathing by Errol Taskin, Shreveport, LA Change the water every day to keep it fresh and clean. Birds seem to prefer baths that are at ground level, but raised baths will attract birds as well. You can purchase a bird bath or simply use dishes or shallow pans. Waterīecause birds need water for drinking and bathing, they are attracted to water just as they are to feeders. Offer the eggshell in a dish or low platform feeder. Let the eggshells cool then crush them into pieces about the size of sunflower seeds. You can boil them for 10 minutes or heat them in an oven (20 minutes at 250 degrees). If you decide to provide eggshells, be sure to sterilize them first. Oyster and egg shells have the added benefit of being a good source of calcium, something birds need during egg laying. Grit, therefore, attracts many birds as a food supplement or even by itself.
To aid in the grinding, birds swallow small, hard materials such as sand, small pebbles, ground eggshells, and ground oyster shells.
Birds “chew” their food in the muscular part of their stomach, the gizzard.
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