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2018, Menno Schilthuizen, “Darwin comes to town”, in The Guardian:
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.
American cliff swallow on Wikipedia.Wikipedia 
Petrochelidon pyrrhonota on Wikispecies.Wikispecies 
Petrochelidon pyrrhonota on Wikimedia Commons.Wikimedia Commons 
