There are currently 609 known species of the Order Caprimulgiformes which includes eight families: Podargidae (Froghmouths-16 species), Caprimulgidae (Nightjars-97 species), Nyctibiidae (Potoos-7 species), Steatornithidae (Oilbird-1 species), Aegothelidae (Owlet-nightjars-9 species), Apodidae (Swifts-112 species), Hemiprocnidae (Treeseifts-4 species), and Trochilidae (Hummingbirds-363 species). I have photographed 11 (1.8%) of these species of birds, across three families shown below.
Family: Caprimulgidae
–Common Nighthawk (Chordeiles minor)
–Chuck-will’s-widow (Antrostomus carolinensis)
Family: Apodidae
–Chimney Swift (Chaetura pelagica)
–Plain Swift (Apus unicolor)
–Pallid Swift (Apus pallidus)
–White-throated Swift (Aeronautes saxatalis)
Family: Trochilidae
–Ruby-throated Hummingbird (Archilochus colubris)
–Black-chinned Hummingbird (Archilochus alexandri)
–Anna’s Hummingbird (Calypte anna)
–Rufous Hummingbird (Selasphorus rufus)
–Allen’s Hummingbird (Selasphorus sasin)