The One-eyed Sphinx goes by many names, but the singular blue eyespot hidden on the hingwings remains constant.
Sphinx Moths are a family of enormous moth that almost always attract attention when they come around at night. This particular species is part of a group that has eyespots on the hindwings. Compared to other similar-looking Sphinx Moths, the One-eyed Sphinx has a solitary blue spot with a black pupil in each eyespot. In contrast, the Twin-spotted Sphinx has two blue spots, and the Blinded Sphinx lacks the black pupil.
This dark brown and gray moth may have violet tones. Pale veins run down the wings and are especially visible as they cross the dark brown band in that crosses the middle of the wings and their bottom edges. White lines separate the dark center of the furry thorax from its lighter sides. Multicolored hindwings, when visible, have an inner white edge next to a large black spot that circles a blue eyespot. Bright pink color above the eyespot blends into a pale yellow under the eyespot.
Females lay green oval eggs on the leaves of host trees. Larvae are plump and green with tiny white bumps all over them. They can become more pale or brown as they prepare to pupate for winter. A blue horn extends from the top of the body by the rear. A bold white, or yellow, diagonal line on both sides of the face is repeated by the rear at the blue horn. Short diagonal lines run the length of the sides as does a thin white line near the 'spine'. Caterpillars of the One-eyed Sphinx feed on pear, plum, poplar, basswood, birch, and willow trees. Adults do not eat. Look for them near lights after sunset. They are active from mid-spring through most of summer and prefer areas where host trees grow.
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Butterfly and Moth Anatomy
Antennae: Butterflies and Moths have a pair of antennae on the head used as sensors.
Head: The head is home to the insect's eyes, antennae, and proboscis.
Thorax: Home to the three pairs of legs as well as vital internal organs.
Abdomen: Contains vital internal organs such as the heart(s) and reproduction facilities.
Forewing: The upper, forward wing pair used for flying.
Hindwing: The lower, rearward wing pair used for flying.
NOTE: Butterflies and Moths are part of the Lepidopteran order as they share many similarities.