''Rhagastis binoculata'' is a

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...

of the family Sphingidae. It is known from

Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the nort ...

. The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the other wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingspan of ...

is 54–63 mm. It is very similar to '' Rhagastis albomarginatus dichroae'' and distinguishable only by the pinkish-grey oval patch across the postmedian lines on the forewing upperside. The forewing upperside is also very similar to ''Rhagastis albomarginatus'', but the conspicuous oval pale patch that divides the postmedian lines is pinkish grey. The hindwing underside has a small black discal spot. Larvae have been recorded feeding on ''

Hydrangea chinensis ''Hydrangea chinensis'' is a species of flowering plant in the family Hydrangeaceae, native to Myanmar, southeast China, and Taiwan. Subtaxa The following varieties are accepted: *''Hydrangea chinensis'' var. ''chinensis'' *''Hydrangea chinensis ...

''.

References

Rhagastis Moths described in 1909 {{Macroglossini-stub