any of various swallows and martins that nest on cliffs; esp. the crag martin, Ptyonoprogne rupestris; cf. rock martin n.
单词 | θ40019 |
释义 | the world > animals > birds > order Passeriformes (singing) > non-arboreal (larks, etc.) > [noun] > family Hirundinidae > genus Hirundo > other types of (1) rock swallow1783 any of various swallows and martins that nest on cliffs; esp. the crag martin, Ptyonoprogne rupestris; cf. rock martin n. |
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