Thorybes pylades Cecropterus pylades, the northern cloudywing, is a butterfly species of the family Hesperiidae.

Both males and females have completely dark brown wings except for the small triangular clear spots.

The northern cloudywing is seen from Nova Scotia west across Canada, south into California and across the rest of the United States.

Adults lay eggs singly under the leaves of their host plants.

The caterpillars then will eat till they are ready to pupate at which point they will roll themselves into the host plants' leaves.