During the winter, a White-crowned Sparrow’s body contains about 3 grams of fat of which ˝ is used up at night and must be replaced everyday. They eat mainly seeds of weeds and grasses, plus considerable numbers of caterpillars, wasps, beetles, and other insects during the summer. They also eat grains such as oats, wheat, barley, and corn, and fruit including elderberries and blackberries. During winter and on migration these birds frequent thickets, weedy fields, agricultural fields, roadsides, and backyards where they search for food.
~ White Crowned Sparrow Life History

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