First you hear trumpet-like calls and then you see them, the small black dots in the sky above the Hanfbachtal in Hennef, which together form a large flock of cranes.
The study "Photography in Corona times" by the Tenckhoff photo archive shows the effects of the pandemic on hobby, amateur and professional photographers.
Insiders call it the "Magic Mountain", the Heinrich-Hildebrand-Hill in Duisburg's Angerpark, on which the artists Heike Mutter and Ulrich Genth have erected a huge construction reminiscent of a roller coaster and called Tiger and Turtle.