description One-eyed sphinx Overview
The one-eyed sphinx (Smerinthus cerisyi) is a species of hawkmoth native to western North America, ranging from Alaska to California. The moth features gray, mottled forewings that provide camouflage against tree bark, while its hindwings display a prominent, blue and black eyespot used to deter predators. The larvae are heavy-bodied green caterpillars that feed primarily on willow and poplar trees. Described by William Kirby in 1837, adults do not feed and rely entirely on energy stored during their larval stage.
help One-eyed sphinx FAQ
Why is Smerinthus cerisyi called the one-eyed sphinx?
Each hindwing carries a prominent blue-and-black eyespot, but the forewings conceal much of the pattern while the moth rests. A sudden flash of the hindwings can create a startling eye-like display for a predator.
What do one-eyed sphinx caterpillars feed on?
Their host plants include willows and poplars, members of the family Salicaceae. Females lay eggs near suitable foliage so the emerging larvae can begin feeding.
Do adult one-eyed sphinx moths eat?
Adults in the genus Smerinthus have reduced mouthparts and generally do not feed. They rely on energy stored during the caterpillar stage for their relatively short adult lives.
Where is the one-eyed sphinx found?
Smerinthus cerisyi occurs across much of northern and western North America. Its range includes parts of Canada and the United States where willow and poplar hosts are available.
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