Parnassius clodius is a white butterfly which is found in the United States and Canada. It is a member of the snow Apollo genus (Parnassius) of the swallowtail family (Papilionidae). Its elevation range is 0–7,000 ft (0–2,134 m).

Parnassius is a genus of northern circumpolar and montane butterflies usually known as Apollos or snow Apollos. They can vary in colour and form significantly based on their altitude. They also exhibit altitudinal melananism, a high-altitude adaptation. They have dark bodies and darker coloring at the base of their wings, which allows them to absorb solar energy more quickly.