The Pine Tussock or Grizzled Tussock (Dasychira grisefacta) is a species of moth of the Lymantriidae family. It is found in Alberta, from British Columbia to Arizona and Oregon, in New Mexico, Montana, South Dakota and North Dakota. The wingspan is about 42 mm for males, the females are wingless. The larvae feed on Pseudotsuga menziesii, Tsuga heterophylla, Picea engelmannii, Picea glauca, Pinus ponderosa and Pinus edulis.