Online citizen science platforms for nature observations provide valuable data for nature enthusiasts and scientists, but typically emotions and feelings experienced in nature are not shared there. Through focus groups with users of the Dutch citizen science platform Waarneming.nl, we explored how affective nature experiences are shared. We found that citizen scientists exchange affective experiences through face-to-face conversations or social media and hear about others’ experiences through traditional media. Affects are shared to enthuse others to go into nature, respect or connect more with nature, feel recognized and cope with varying affects experienced in response to environmental loss. Yet, these affects are generally not shared on platforms like Waarneming.nl as these media are associated with knowledge production, science and policy, which users perceive to be in opposition to affect. We reflect on this perceived tension between science and affect, suggesting potential ways to overcome this.

Digital citizen science projects differ greatly in their goals and design. Tensions arise when coordinators' design choices and conceptions of citizen science conflict with users' motivations and expectations. In this paper, we use a combination of qualitative methods to gain new insights into the ways citizen science is understood and implemented digitally. This includes a study into the affordances of two citizen science portals for bird observations, and qualitative interviews with users and coordinators of the portals. This reveals tensions related to data sharing, community hierarchies, and communicated expectations. Awareness of these tensions can benefit the future design of online citizen science projects.