Location: southeast Texas
November 16, 2015 8:44 am
It was the size of a tomato worm, but out in the marsh.
While it is a different species, your Banded Sphinx larva is in the same family, Sphingidae, as the Tomato Hornworm. The Banded Sphinx larva is highly variable, but we did locate an individual with this coloration on BugGuide. The Banded Sphinx larva loses its distinctive caudal horn in an early molt, rendering it a hornless Hornworm. According to BugGuide: “Larvae feed on Evening Primrose, Oenothera species, Water Primrose, Ludwigia species, and other related plants (Onagraceae)” and water primrose grows in marshes, so that is most likely what this individual was feeding upon.