Feeding on caterpillars or erucas; used to describe animals or birds that eat caterpillars as a primary food source.
Composed of 'eruca' (caterpillar) and '-vorous' (eating). A specialized zoological term for animals with specific dietary habits.
Warblers and other insectivorous birds are technically erucivorous during spring when caterpillars are abundant—they time their breeding to match peak caterpillar season, a coordination that's almost perfectly synchronized.
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