Least Nighthawk is widely distributed and is fairly common across its range. Nonetheless, most aspects of its natural history are very poorly known. Perhaps the most fundamental unanswered question regarding this species is which populations are resident, and how much of the large geographic range of the species is occupied only on a seasonal basis. There also is no information on such topics as age at first breeding, life span and survivorship, dispersal, population regulation, molts, territoriality and population density, sexual behavior, and responses to predators. Further research and observation could help clarify many of these topics.