noun, masculine/sfɛ̃ks vɛs.pɛʁ.ti.ljɔ/plural: sphinx vespertilios
sphinx vespertilio is masculine in French.
Hyles vespertilio
“La chenille du sphinx vespertilio se nourrit sur un épilobe (Epilobium rosmarinifolium) ou sur le gaillet jaune.” — The Hyles vespertilio caterpillar feeds on willowherb (Epilobium rosmarinifolium) or yellow bedstraw.
Synonyms: cendré, sphinx chauve-souris
From sphinx + Latin vespertīliō.