American cliff swallow

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English

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American cliff swallow

Noun

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American cliff swallow (plural American cliff swallows)

  1. Petrochelidon pyrrhonota, a member of the passerine bird family Hirundinidae.
    • 2018, Menno Schilthuizen, “Darwin comes to town”, in The Guardian[1]:
      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.

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