The Sonoran Sphinx (Ceratomia sonorensis) is a moth of the Sphingidae family. It is known from high altitudes in oak and oak-pine associations in Madrean woodland in Sonora, Mexico and in south-eastern Arizona.The wingspan is 84–89 mm. The upperside of the forewing is mostly dark gray, while the upperside of the hindwing is mostly dark brown.There is one generation per year with adults on wing from July to August.The larvae feed on Fraxinus species.