The 2026 edition of the IVN Dutch Ditch Days will take place between 5 and 7 June. During these days, IVN guides children in taking a closer look at the aquatic animals and plantlife in Dutch ditches. NIOO uses the observations of the children to study trends in water biodiversity and water quality.

How can biodiversity be safeguarded effectively in the long term? This is the core question of the 8th European Congress for Conservation Biology (ECCB). The congress will be held in Leiden, from 6 until 10 July 2026.

In een gezonde bodem leven bodemdieren. Zoek je mee? Dat kan overal: in je eigen tuin, het park om de hoek, op het schoolplein of zelfs het balkon. In 2026 voor de 12e keer alweer.

Save the date: on Saturday 3 October 2026, NIOO will open its doors again to visitors for our Big Open Day. From 11:00 to 17:00, everyone will be welcome. Seize your chance to take a look in our labs and experimental gardens: only possible once in every three years!