🌐EnglishEnglishDeutschEspañolFrançaisItalianoPolskiPortuguêsTiếng ViệtРусскийالعربيةفارسی中文日本語EntityQ2979464· pop 21· linked from 19 articlesBehavioral sinkconceptual collapse in behavior which can result from overcrowdingAvailable in 21 languagesEspañolFrançais中文日本語РусскийPortuguêsItalianoالعربيةBasqueCatalanDanishConnectionsethologyEntitypopulation declineEntityCategories1962 introductions1962 neologismsCrowd psychologyEthologyHuman overpopulationPopulation ecology