Hardly any nature reserve in Hamburg is as varied, hardly any is home to so many animal and plant species as the Duvenstedter Brook. At the same time, agricultural use and climate change threaten its habitat. 100 bird species alone breed in the area and these require special protection from spring onwards. Timo Depke, head of the NABU group “Walddörfer”, then looks after the cranes with great dedication. During the breeding season, he works 24 hours a day several times a year on the “crane watch” in the middle of the forest. In addition, he strives for the renaturation of the wetlands. Because not only ground-nesting birds such as cranes benefit from full moors, swamps and ponds, but also many other creatures in the Brook. Geographer Joana Schadt and biologist Björn Rickert are committed to the extraordinary diversity of the Brook landscape with its meadows and bogs on a daily basis. Over the course of six months, the report highlights how meaningful care of the nature reserve can work for humans, animals and plants.