City Nature Challenge

Started in 2016 as a competition between Los Angeles and San Francisco, the City Nature Challenge (CNC) has grown into an international event, motivating people around the world to find and document wildlife in their own cities.

Since 2025, the Team Co-Creation & Engagement, in partnership with the Leibniz Institute for the Analysis of Biodiversity Change (LIB), has been supporting Hamburg’s participation in the CNC. Our goal is to promote public understanding and engagement with biodiversity and to strengthen co-creative approaches to citizen science.

In addition to mobilizing participants at the University of Hamburg during the 4-day global bioblitz, in 2025 we organized two City Nature Walks in cooperation with the University’s Sustainability Office—one at the Science City Bahrenfeld campus and another at Von Melle Park. These walks combined quantitative and qualitative methods to enhance natural experience and observation, fostering discussion and awareness around local biodiversity.