Walnut Sphinx Moth

Deciduous forests, woodlands, and suburban areas where host trees like walnut, hickory, and butternut are present.

Larvae feed on the foliage of walnut, hickory, butternut, and occasionally beech or hazelnut. Adults do not feed.

Primarily nocturnal and attracted to lights at night. Caterpillar larvae are unique for producing a high-pitched 'whistle' sound to deter predators by forcing air through their spiracles.

No risk to humans as they do not bite or sting. They serve as a food source for birds and bats, though the caterpillars can cause minor defoliation of host trees.