Like other sphinx moths, the adults have protruding heads, large eyes, a large “furry” thorax, and a conical abdomen that extends well beyond the hindwings when the moth flies. This particular sphinx moth mimics a bumblebee: The body is fuzzy golden yellow, and the abdomen has black and yellow bands. The wings have large central patches that lack scales and are thus clear. The legs and most of the underside of the body are black.
Larvae are usually green with black spiracles. Behind the head is a yellow “collar.” As with other sphinx moths, the caterpillar is a “hornworm” with a pointy “tail” arising from the end of the body; the horn on this species is black with a yellow base.