| 单词 | black swift | 
| 释义 | > as lemmasblack swift   black swift  n. (usually with distinguishing word) any of various swifts with black plumage; esp. (more fully  American black swift)  Cypseloides niger, of North and Central America. ΚΠ 1817    T. Forster Synoptical Catal. Brit. Birds 55  				Apus cypselus... Black swift. 1868    Ibis 4 152  				Cypselus barbatus... South-African Black Swift. 1901    Auk 18 394  				On reaching the locality, I noticed a pair of Black Swifts flying about over the cliffs. 1962    C. D. Sherman tr.  J. Dorst Migrations of Birds iii. 69  				The spine-tailed swift..and the American black swift..also perform unusual flights, quite distinct from migrations. 2008    P. Briggs Ukhahlamba-Drakensberg Park 73  				The outsized Alpine swift, which nests colonially on cliffs, often alongside the African black swift. < as lemmas | 
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