Common Grackles do well in human landscapes, using scattered trees for nesting and open ground for foraging. They eat mostly seeds, particularly agricultural grains such as corn. Other seeds include sunflower seeds, acorns, tree seeds such as sweetgum, wild and cultivated fruits, and garbage. In summer, one-quarter or more of a grackle’s diet may be animals, including beetles, grasshoppers, caterpillars, spiders, crustaceans, mollusks, fish, frogs, salamanders, mice, and other birds.
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