The cinereous mourner (Laniocera hypopyrra) is a species of bird in the family Tityridae.

It has traditionally been placed in the cotinga family, but evidence strongly suggest it is better placed in Tityridae,[2] where now placed by SACC.

It is found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela.

Nestlings of this species are orange with long filoplumes that end in white tips and have a resemblance to hairy caterpillars of a moth belonging to the family Megalopygidae.

It is thought that this may be the first case of Batesian mimicry involving a harmless bird mimic and a toxic insect model, although another species, the elegant mourner (or shrike-like cotinga) (Laniisoma elegans), also has young that share a similar downy appearance; however, detailed observations of the latter are unavailable.