Northern Prairie Wildlife Research Center

Caterpillars of Eastern Forests

Four-horned Sphinx (Ceratomia amyntor) [Elm Sphinx]

JPG-Photo of

Superb, unmistakable green or brown caterpillar with 4 spinulose thoracic horns. Body covered with white-tipped granules. Dorsal abdominal midline produced as scalelike ridge. Food: elms and basswoods, also reported from birches and cherries. Caterpillar: June through October; 2 generations in South; 1 in North.

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