Cf. the French "Crapaud-volant" or Flying Frog, applied to Nightjars.
The Cypselomorphae of Huxley included Swifts, Humming-birds, and the Nightjar group.
D'Albertis noticed Macropteryx mystacea settling on trees in the day-time, and Shufeldt saw Cypselus melanoleucus sitting on rocky pinnacles.
Green, J. Physiol. vi. 1885, pp. 41-45.
P.Z.S. 1863, pp. 191-192.