American cliff swallow

名词 n.

英文释义

名词 n.
  1. Petrochelidon pyrrhonota, a member of the passerine bird family Hirundinidae.
    — Researchers in the US found that the wingspan of American cliff swallows, which took up the habit of colonising concrete highway bridges in the 1980s, had decreased by about two millimetres a decade since then.

词形变化

American cliff swallows plural
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