Abstract Teaching about biodiversity is seen today as significant by several researchers because human survival depends on biodiversity. The study aims to describe and understand student teachers' experiences of biodiversity and what student teachers identify as central to teaching about biodiversity. In the present study, student teachers have been seen as particularly important because they will meet many young students as future preschool and primary class teachers. The data collection was carried out through semistructured interviews with three focus groups. The preliminary results show that the students express feelings concerning the loss of biodiversity related to their future, present, and past, as well as feelings directed toward a universal future. The preliminary results also show ideas about what they consider central to teaching. The student teachers, for example, describe the importance of young students experiencing nature, facing different resource dilemmas, discussing different values, and doing something practical that positively affects biodiversity. They put more emphasis on students developing awareness of the consequences of biodiversity loss than on developing knowledge of the concept of biodiversity.