Family: Sphingidae (Hawk Moths)
Subfamily: Macroglossinae
Species: Theretra clotho clotho (Drury, 1773)

Location: Along the road leading to Singapore Quarry

Frequents open forest, forest edge, orchards, plantations, wooded scrub, suburban gardens and city parks. A species which likes warm humid areas, being confined to regions with medium to heavy rainfall (Bell & Scott, 1937). They avidly visit flowers at and after dusk (Bell & Scott, 1937) and may sometimes be attracted to light.
- Source: Sphingidae of the Eastern Palaearctic by A.R. Pittaway & I.J. Kitching

Note 1: ID by Roger Kendrick & Craig Williams.
Note 2: One of the host plants observed in Singapore is Cissus hastata (family Vitaceae).