Caterpillar, which will eventually be an Ello Sphinx Moth (Erinnyis ello)
Larvae feed on several plants, including poinsettia (Euphorbia pulcherrima). Once this caterpillar spins its cocoon, it will emerge as an Ello Sphinx Moth.
There are two caterpillars eating this poinsettia. (November 18, 2006)