Euploea tulliolus, the dwarf crow or small brown crow, is a butterfly found in the Solomon Islands, Malaysia, Taiwan, Vietnam, Singapore and Australia, that belongs to the crows and tigers, that is, the danaid group of the brush-footed butterflies family. It has a wingspan of about 4 to 8 centimeters. Due to the purple iridiscence of the butterfly under sunlight, the butterfly is also commonly referred to as the purple crow (紫斑蝶).