Gardener with basket of egg shells spreading crushed shells around tomato plant - VH-studio/Shutterstock A quality eggshell contains about 2.2 grams of calcium carbonate, the compound that gives them ...

When laying eggs, female hummingbirds and several other birds exhaust a lot of their body’s calcium supply. This means they need a good calcium supplement to replenish their bones and build muscle.

Q: Every winter, we feed the birds, and attract several different species. Last winter, we saw no blue jays at all. This winter they are back, and come to feed in a small flock. They eat plenty of ...

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