RUDN Journal of Ecology and Life SafetyRUDN Journal of Ecology and Life Safety2313-23102408-8919Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)12285The moment of the critical fear in defensive behaviour of birds under repellent influenceEnaleevI RБиологический факультет; Казанский федеральный университет; Kazan Federal Universitykrechet.65@mail.ru <mailto:krechet.65@mail.ru>ArininaA VБиологический факультет; Казанский федеральный университет; Kazan Federal Universityarininalla@mail.ruKazan Federal University1503201235912092016Copyright © 2012, Enaleev I.R., Arinina A.V.2012In this paper we consider the moment of the critical fear in the definitive behavior of birds exposed to repellent effects. The examples of the use of birds of prey as biorepellents are given.ornithological safetygregarious birdsdefensive behaviorbiorepellentsорнитологическая безопасностьстайные птицызащитное поведениебиорепелленты