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Insects and spiders make up the bulk of this wrenâs diet. Common foods include caterpillars, moths, stick bugs, leafhoppers, beetles, grasshoppers, crickets, and cockroaches. Carolina Wrens occasionally eat lizards, frogs, or snakes. They also consume a small amount of plant matter, such as fruit pulp and seeds from bayberry, sweetgum, or poison ivy.
Many species also take vegetable matter such as seeds and berries, some (primarily the larger species) take small frogs and lizards; the Eurasian wren has been recorded wading into shallow water to catch small fish and tadpoles; Sumichrast's wren and the Zapata wren take snails; and the giant wren and marsh wren have been recorded attacking and eating bird eggs (in the latter species, even eggs of conspecifics).