The Vigie-Nature programme, run by the Muséum national d'Histoire naturelle (MNHN) and the French Biodiversity Office (OFB), puts scientific observation of biodiversity within everyone's reach: pupils and teachers, budding or experienced naturalists, farmers and municipal gardeners. Training the eye to see microcosms, helping others, working for the common good, taking time away from our fast‑paced lives: there are significant benefits for both the general public and the professionals who take part.