Breeding season on the Dorrigo Plateau: Thought to be September to April Breeding season elsewhere - not confirmed but thought to be all year in the Tropics and limited to the warmer months in the cooler States.
Flight habit: Nocturnal - Active at night.
Adult Moth: Size at rest - tip of thorax to tip of forewing: ?? - ??mm Mature larva: length - ??mm. Colour forms in the final instar are Green, Brown, Red or Dark Grey.
Interesting information: Max Moulds responding to a 'Facebook' question regarding Hippotion celerio making an unusual sound - "The sound heard in Hippotion celerio almost certainly was produced by the male genitalia that have friction scales on the outer side of the valvae used in stridulation. In the subtribe Choerocampina which includes Hippotion these friction scales are quite large and sound is produced by rubbing the valvae against the abdomen. The purpose is not entirely understood but one purpose seems to be to jam the 'radar' of bats but it may be used during mating. We briefly discuss this topic in our Australian Hawk Moth book published early in 2020".