Understanding a species’ diet is important to our knowledge of its natural history and enables conservation.  Gathering such information can be complicated by frequent taxonomic changes, making the comparison of diets difficult between and within species complexes.  Nightsnakes (Hypsiglena spp.) have been subject to extensive taxonomic reassignment since their description in the mid-nineteen century making it difficult to synthesize the diet for any single or newly reorganized species within the complex.  This presentation explores the known prey items of Hypsiglena spp., categorized by species and subspecies, obtained from literature, community observations, and museum specimens. Scientific literature provided the majority of Hypsiglena spp. prey information, followed by community observations and museum specimens.  In total, a minimum of 62 prey species across seven species of Hypsiglena are recorded, and three species within the genus lack prey records.  This information can be useful in identifying areas for future investigation and for conservation of these species.   Additionally, after examining the literature on the genus, it’s apparent that much of our knowledge of the California Nightsnakes (H. ochrorhyncha nuchalata) is inferred from other subspecies. I discuss gaps in our natural history knowledge for this subspecies in particular and suggest areas for further study.