(Caprimulgidae; Ϯ Long-trained Nightjar M. forcipata) Gr. μακρος makros  long; ψαλις psalis, ψαλιδος psalidos  pair of scissors; "Genus 6. HYDROPSALIS.  ...  Subgen. 3. No white band on primaries; tail singly forked; outer pair of rectrices of male more than double the length of medial pair, which are the shortest. . . .Macropsalis.   ...   Subgen. 3. Macropsalis.  The species of this group may be differentiated  ...  by their two external elongated tail-feathers   ...  5. HYDROPSALIS FORCIPATA.   ...  6. HYDROPSALIS YPANEMÆ.  ...   7. HYDROPSALIS LYRA.   ...   8. HYDROPSALIS SEGMENTATA." (P. Sclater 1866); "Macropsalis Sclater, Proc. Zool. Soc. London, 1866, p. 141 (in key), p. 143. Type, by subsequent designation, Caprimulgus forcipatus Nitzsch = Hydropsalis creagra Bonaparte (Hartert, Cat. Bds. Brit. Mus., 16, 1892, p. 601.)" (Peters 1940, IV, 219).

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Recommended citation
Jobling, J. A. (2019). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2019). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 23 January 2019).