Caltoris cahira, the colon swift, is a species of skipper butterfly found in Asia.

It mainly found in the forest area of south Asian countries like Bangladesh, India, etc.

Females have, in addition to the eight spots present in males, a more or less well-developed triangular bright yellow opaque one touching the submedian rather beyond the middle of this, and appearing on the underside as an imperfect band between that vein and the first median veinlet ; and, moreover, have the whole underside thickly and evenly clothed with rufous-brown scales.

(Wood-Mason and de Niceville)Seen in the south Andaman Islands.

A related species is found in northeastern India (Sikkim) and is sometimes considered a subspecies Caltoris cahira austeni.