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HornwormsNeed Caterpillar ID
September 25, 2009
Could you please identify this caterpillar? It was found on a Willow tree this week (September 2009), in Los Angeles, CA. It measures aprox. 1.5 inches long.
S Logan, Los Angeles CA
Los Angeles CA
Dear S Logan,
What a nice find. This is a One Eyed Sphinx or Cerisy’s Sphinx Caterpillar, Smerinthus cerisyi. Bill Oehlke’s Sphingidae of the United States website has images of the adult moth as well as other stages of development. This is a wide ranging species in North America. In addition to willow, the larvae also feed on poplar.


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