Scissor-tailed Nightjar is insectivorous; the diet includes beetles (Coleoptera), moths (Lepidoptera), flies (Diptera), lacewings (Neuroptera), bugs (Hemiptera), ants (Formicidae), cuckoo wasps (Chrysididae), bees, Orthopterans, termites (Isoptera), cockroaches (Blattaria: Blattidae), mantises (Mantodea: Mandidae), and cicadas (Cicadidae) (Schubart et al. 1965, Cleere 1998). Beetles seem to be particularly important elements of the diet. Beetles were found in each of 17 stomachs of Scissor-tail Nightjars examined by Schubart et al. (1965), including representatives of Aphodiidae, Bostrichidae, Brentidae, Carabidae, Cerambycidae, Chrysomelidae, Curculionidae, Ecotylidae, Elateridae, Geotrupidae, Hydrophilidae, Scarabaeidae, and Tenebrionidae.