show Abstracthide AbstractSarcophaga bullata Parker (Diptera: Sarcophagidae) is a flesh fly widely distributed across North America. Like other members of this family, the female gives birth to active first instar larvae that are deposited on carrion and thus can begin to feed immediately. This life style exposes the larvae to a plethora of stresses including anoxia, temperature extremes, and pathogens. S. bullata and a sister species, S. crassipalpis, are large flies that are easy to rear in the laboratory, making them useful models for diapause, cold tolerance, and other stress responses.