There are currently 98 known species of the Order Caprimulgiformes which includes one family. I have photographed 4 (4.1%) of these species of birds, across three families shown below.
Family: Caprimulgidae
–Common Nighthawk (Chordeiles minor)
–Chuck-will’s-widow (Antrostomus carolinensis)
–Lyre-tailed Nightjar (Uropsalis lyra)
–Rufous-bellied Nighthawk (Lurocalis rufiventris)