Parnassius smintheus (Rocky mountain parnassian)

Parnassius smintheus, the Rocky Mountain parnassian, or Rocky Mountain apollo, is a high-altitude butterfly found in the Rocky Mountains throughout the United States and Canada. It is a member of the snow Apollo genus (Parnassius) of the swallowtail family (Papilionidae). The butterfly ranges in color from white to pale yellow-brown, with red and black markings that indicate to predators it is unpalatable.

— Wikipedia