Litter moths are a subfamily of rather nondescript brownish moths, often with intricate patterns that camouflage them as they rest on tree bark or among leaf litter on the forest floor. A few species are nearly white. Identifying the various species usually involves the patterns on the wings but may also require examination of the mouthparts.
There are more than 75 species in this subfamily in North America north of Mexico.
The litter moths used to be a subfamily in the formerly large noctuid family (owlet moths), and in the past they have been placed in their own family.
They hold their wings flat and to the sides, giving them a triangular shape when seen from above. Males often have palps (mouthparts) that they extend in front of their heads.