house martin
From Longman Dictionary of Contemporary EnglishRelated topics: Birdshouse martinˈhouse ˌmartin noun [countable] HBBa small black and white European bird of the swallow familyExamples from the Corpushouse martin• Another ingenious construction technique is demonstrated by the house martin.• The technical skill of the house martin enables it to construct gravity-defying mud nests beneath the eaves of houses.