The orange swift (Triodia sylvina), also known as "orange moth" (but see Angerona prunaria), is a species of moth belonging to the family Hepialidae. It was previously placed in the genus Hepialus. It is distributed throughout Europe. This species has a wingspan of 32–48 mm. The male has rich orange forewings with two white bars forming a "v" shape. The hindwings are dark brown. The female is similar but generally larger and less brightly coloured. It flies at night from June to September and is attracted to light.