Deciphering the diversity and history of New World nightjars (Aves: Caprimulgidae) using molecular phylogenetics Author Sigurðsson, Snorri Author Cracraft, Joel text Zoological Journal of the Linnean Society 2014 2014-03-12 170 3 506 545 http://dx.doi.org/10.1111/zoj.12109 journal article 10.1111/zoj.12109 0024-4082 5346424 HYDROPSALIS RUFICERVIX (P.L. SCLATER, 1866) Definition Previously Caprimulgus longirostris ruficervix . It is elevated to full species status. It is the sister species of H. roraimae . Together the two species form a clade that is sister to H. longirostris . Diagnosis Intermediate in size and body shape to H. longirostris and H. roraimae . Its plumage is most similar to H. roraimae , but is slightly lighter and is more distinctly cinnamon coloured, with white spots. Comments See previous section on H. roraimae .