This thesis deals with the topics of global warming and pollution, biodiversity and summarizes the efforts made so far at the global level to prevent consequences within this framework of the problem, according to the base of activities for the protection of endangered species. The focus of the thesis is on the marketing of non-profit organizations, more precisely explores the role in the implementation and optimization of organizational activities for the protection of endangered animals and the overall benefits that the use of marketing can bring to non-profit organizations. The basis of this paper is a survey conducted through a questionnaire sent to certain organizations in Croatia. By analyzing the answers to the questionnaire, we conclude that during the COVID-19 pandemic, a positive impact on animals is noticed because people do not disturb their habitats. Thanks to international animal exchange cooperation, population growth has been achieved. Due to poor awareness of people, poaching in the sea has increased. All organizations use social networks and conduct workshops for the local population to increase engagement in the protection of endangered species.