With over 660,000 members and supporters, NABU is the oldest and largest German organisation for the protection of nature. Its inner organisation closely aligns with Germany’s federal structure, i.e. parallel to the national organisation, 15 federal state associations as well as its Bavarian partner association LBV attend the respective federal state governments. In addition to that, honorary campaigners organise themselves in about 2,000 local and regional groups.In a pro bono project, 3con supported a process to improve the co-operation of boards between the federal state divisions and the national organisation of NABU.