Cos4Cloud will co-design, prototype and implement services that address the technological challenges shared by citizen observatories of biodiversity, based on the experience of platforms like: Artportalen, Natusfera, iSpot, Pl@ntNet as well as other environmental quality monitoring platforms like: FreshWater Watch, KdUINO, OdourCollect, iSpex and CanAir.io. The design of new services will be user oriented, engaging a wide range of stakeholders in society, government, industry, academia, agencies, and research to co-design service requirements.