🌐EnglishEnglishDeutschEspañolFrançaisItalianoPolskiPortuguêsTiếng ViệtTürkçeفارسی中文EntityQ2227505· pop 15· linked from 377 articlesblack triangleclass of UFOs, with certain common features which have reportedly been observed during the 20th and 21st centuriesWikidata factsImageBlacktriangle.jpgSources (2)wikidata.orgen.wikipedia.orgvia Wikidata · CC0Available in 14 languagesEspañolFrançaisDeutsch中文PortuguêsItalianoBulgarianCroatianPolskiSerbianConnectionsunidentified flying objectEntityalien abductionEntityCategoriesAviation incidents involving UFOs and military aircraftStealth aircraftUFOs by type