Indoor-invader
Guides
Ceroxys
picture-winged flies
Ceroxys is a genus of picture-winged flies in the family Ulidiidae, comprising approximately 20 described species distributed primarily across the Northern Hemisphere. Adults are recognized by their distinctive patterned wings featuring dark spots, bars, or lines on a translucent background. The genus includes notable species such as Ceroxys latiusculus, which is common in western North America and frequently observed indoors during fall and winter. Larval development occurs in plant seed heads, particularly Senecio species.