Cossidae

The Cossidae, the cossid millers or carpenter millers, make up a family of mostly large miller moths. This family contains over 110 genera with almost 700 known species, and many more species await description. Carpenter millers are Lepidoptera found worldwide, They are nocturnal, except for the Southeast Asian subfamily Ratardinae.

thumb|left|Witchetty grubs (Endoxyla leucomochla) of the subfamily [[Zeuzerinae]] This family includes many species with large caterpillars and moths with a wingspan from . These moths are mostly grey; some have long, narrow wings and resemble hawkmoths (Sphingidae) which are more advanced macrolepidoptera, however. Many are twig, bark, or leaf mimics, and Cossidae often have some sort of large marking at the tip of the forewing uppersides, conspicuous in flight, but resembling a broken-off twig when the animals are resting.