117 species in 58 genera are known from Block Island. This is the most speciose lepidopteran family worldwide, though it is surpassed by Noctuidae, Geometridae, and Tortricidae in the Nearctic region.

Zahiri R., J.D. Holloway, I.J. Kitching, J.D. Lafontaine, M. Mutanen, and N. Wahlberg. 2011. Molecular phylogenetics of Erebidae (Lepidoptera, Noctuoidea). Syst. Entomol. 37: 102–124.